KABUL: Two drivers were killed in a suicide attack on a US-run development base in the relatively peaceful north of Afghanistan, a provincial police chief said Saturday.

The top policeman in Panjshir province, Mohammad Qasim Jangalbagh, said four suicide attackers had targeted the US Provincial Reconstruction Team (PRT) facility in the district of Rokha, leaving two guards also wounded.

He said the four attackers had approached the base, one inside a four-wheel drive vehicle and the others on foot.

“An explosion targeted the PRT in Panjshir left two drivers dead and two guards of the PRT wounded,” said Jangalbagh.

He said the drivers had been bringing fuel supplies to the base when it came under attack.

Isaf spokesman Christopher Pewitt confirmed the incident but had no record of fatalities.

“We can confirm a suicide attack on the PRT early this morning in Panjshir. There were no casualties to ISAF. Civilians were injured in the blast,” he said, without giving further details.