PESHAWAR, Pakistan (AP) — Militants in northwestern Pakistan attacked trucks ferrying supplies to NATO and U.S. forces in Afghanistan today, killing two people and destroying a dozen vehicles, witnesses and police said.

Meanwhile, a suicide bomber killed eight people and wounded 40 others at a military checkpoint in the region’s Swat Valley, police said.

The spasm of violence comes amid a spike in tensions between Pakistan and rival India over last week’s terror attacks in Mumbai, which New Delhi has blamed on Pakistani militants.

Pakistan has condemned the attacks and vowed to crack down on the perpetrators if New Delhi provides evidence. But there are fears that tensions could nevertheless boil over between the nuclear-armed rivals.

The attack on the U.S.-led coalition trucks took place at a terminal in Peshawar, which sits along the supply route from Pakistan to Afghanistan. The city has seen an upsurge in violence in recent weeks, including the slaying of an American working on a U.S.-funded aid project.