MOGADISHU, Somalia - U.S. helicopter gunships launched new attacks today against suspected al-Qaida members, a Somali official said, a day after American forces launched airstrikes in the first offensive in the African country since 18 U.S. troops were killed there in 1993.

The latest attacks killed at least 27 civilians in the town of Afmadow in southern Somalia, lawmaker Abdiqadir Daqane told The Associated Press.

At least one AC-130 gunship carried out an airstrike Monday evening against targets in the town about 220 miles southwest of the capital of Mogadishu, Somali officials said. It was not immediately clear how many people died in those attacks, but Somali officials said there were reports that many were killed.

The U.S. attacks were targeting Islamic extremists, said a Somali Defense Ministry official who spoke on condition of anonymity because he was not authorized to speak. Earlier, Somalia's president had said the U.S. was hunting suspects in the 1998 bombings of the two U.S. embassies in East Africa, and had his support.

The aircraft carrier USS Dwight D. Eisenhower arrived off Somalia's coast and launched intelligence-gathering missions over Somalia, the military said. Three other U.S. warships are conducting anti-terror operations off the Somali coast.

U.S. warships have been seeking to capture al-Qaida members thought to be fleeing Somalia after Ethiopia invaded Dec. 24 in support of the government and drove the Islamic militia out of the capital and toward the Kenyan border.

The Islamic extremists are believed to be sheltering suspects in the embassy bombings, and the raids are designed to keep the militants from posing a new threat to the government.

The White House would not confirm the attacks, nor would the Pentagon.

A U.S. government official said at least one AC-130 gunship was used Monday evening. The official spoke on condition of anonymity because of the operation's sensitivity.

It was the first U.S. offensive in the Horn of Africa country since the Americans led a U.N. force in the 1990s that intervened in Somalia in an effort to fight famine. The mission led to clashes between U.N. forces and Somali warlords, including the “Black Hawk Down” battle that left 18 U.S. servicemen dead.

Witnesses said at least four civilians were killed Monday 30 miles east of Afmadow, including a small boy. The claims could not be independently verified.

“My 4-year-old boy was killed in the strike,” Mohamed Mahmud Burale told the AP by telephone. “We also heard 14 massive explosions.”

Government spokesman Abdirahman Dinari said it was not known how many people were killed, “but we understand there were a lot of casualties. Most were Islamic fighters.”

Witnesses said that in today's attack, the helicopters opened fire on the road that leads to the Kenyan border. They said they could not clearly make out the markings on the aircraft.

Daqane said two newlyweds were among the dead today.

The U.S. Embassy in Nairobi reissued a terror warning Tuesday to Americans living in or visiting the Horn of Africa.

Monday evening's airstrike came after the suspects were seen hiding on a remote island on the southern tip of Somalia, close to the Kenyan border, Somali officials said. The island and a site near the village of Hayi, 155 miles to the north, were hit.

The main target was Fazul Abdullah Mohammed, who allegedly planned the 1998 attacks on the U.S. embassies in Nairobi and Dar es Salaam, Tanzania, that killed 225 people.

He is also suspected of planning the car bombing of a beach resort in Kenya and the near simultaneous attempt to shoot down an Israeli airliner in 2002. Ten Kenyans and three Israelis were killed in the blast at the hotel, 12 miles north of Mombasa. The missiles missed the airliner.

Fazul, 32, joined al-Qaida in Afghanistan and trained there with Osama bin Laden, according to the transcript of an FBI interrogation of a known associate. He came to Kenya in the mid-1990s, married a local woman, became a citizen and started teaching at a religious school near Lamu, just 60 miles south of Ras Kamboni, Somalia, where one of the airstrikes took place Monday.

Largely isolated, the coast north of Lamu is predominantly Muslim and many residents are of Arab descent. Boats from Lamu often visit Somalia and the Persian Gulf, making the Kenya-Somalia border area ideal for him to escape.

President Abdullahi Yusuf told journalists in the capital, Mogadishu, that the U.S. “has a right to bombard terrorist suspects who attacked its embassies.” Deputy Prime Minister Hussein Aideed told The Associated Press the U.S. had “our full support for the attacks.”

But others in the capital said the attacks would only increase anti-American sentiment in the largely Muslim country.

“U.S. involvement in the fighting in our country is completely wrong,” said Sahro Ahmed, a 37-year-old mother of five.

Already, many people in predominantly Muslim Somalia had resented the presence of troops from neighboring Ethiopia, which has a large Christian population and has fought two brutal wars with Somalia, most recently in 1977.

The U.S. Central Command reassigned the Eisenhower to Somalia last week from its mission supporting NATO-led forces in Afghanistan, said U.S. Navy spokesman Lt. Cmdr. Charlie Brown in Bahrain, where the Navy's Fifth Fleet is based.

“Eisenhower aircraft have flown intelligence-gathering missions over Somalia,” Brown told The Associated Press.

The spokesman said the Eisenhower was the only U.S. aircraft carrier in the region. The vessel is carrying approximately 60 aircraft, including four fighter jet squadrons, he said.

Ethiopia forces had invaded Somalia to prevent an Islamic movement from ousting the weak, internationally recognized government from its lone stronghold in the west of the country. The U.S. and Ethiopia both accuse the Islamic group of harboring extremists, among them al-Qaida suspects.

Ethiopian troops, tanks and warplanes took just 10 days to drive the Islamic group from the capital, Mogadishu, and other key towns.

Ethiopian and Somali troops had in recent days cornered the main Islamic force in Ras Kamboni, a town on Badmadow island, with U.S. warships patrolling offshore and the Kenyan military guarding the border to watch for fleeing militants.

The AC-130 is armed with 40 mm guns that fire 120 rounds per minute and a 105 mm cannon, normally a field artillery weapon. The gunships were designed primarily for battlefield use to place saturated fire on massed troops.

U.S. officials said after the Sept. 11 attacks that extremists with ties to al-Qaida operated a training camp at Ras Kamboni and al-Qaida members are believed to have visited it.

Leaders of the Islamic movement have vowed from their hideouts to launch an Iraq-style guerrilla war in Somalia, and al-Qaida chief Osama bin Laden's deputy has called on militants to carry out suicide attacks on the Ethiopian troops.

Ethiopian Prime Minister Meles Zenawi said in an interview published Tuesday in the French newspaper Le Monde that suspected terrorists from Canada, Britain, Pakistan and elsewhere have been among those taken prisoner or killed in the military operations in Somalia.

Somalia has not had an effective central government since clan-based warlords toppled dictator Mohamed Siad Barre in 1991 and then turned on each other, sinking the Horn of Africa nation of 7 million people into chaos.

A U.N. peacekeeping force, including U.S. troops, arrived in 1992, but the experiment in nation-building ended the next year when fighters loyal to clan leader Mohamed Farah Aideed shot down a U.S. Army Black Hawk helicopter and battled American troops, killing 18 servicemen.

At least 13 attempts at government have failed since then. The current government was established in 2004 with U.N. backing.

- Associated Press writers Mohamed Sheik Nor and Salad Duhul in Mogadishu and Chris Tomlinson in Nairobi, Kenya, contributed to this report.