ISLAMABAD, Pakistan — Islamic militants ambushed a large convoy of military vehicles in troubled northwestern Pakistan yesterday, kidnapping more than 100 soldiers after seizing their weapons, officials said.

The soldiers were traveling in 16 trucks and providing security for trucks carrying food between Wana, the main town in South Waziristan, and Ladha, another town in the region, two intelligence officials said on condition of anonymity because of agency policy.

One of the officials said nearly 100 soldiers were kidnapped, while the other said there were between 100 and 120 soldiers taken. There was no indication if there was a battle or if anyone was wounded in the incident, they said.

“We confirm that several military vehicles were ambushed, and scores of our soldiers are missing, but we have no further details,” said an army official based near the capital, Islamabad, who spoke on condition of anonymity because of the sensitive nature of the issue.

The reports could not be independently confirmed because the region is remote and dangerous. A senior intelligence official in South Waziristan said about 100 soldiers were leaving Wana by road when hundreds of militants attacked them.

“Efforts are under way to trace and rescue the missing soldiers,” he said.