PESHAWAR, Pakistan -- A U.S. drone strike hit a vehicle in northwestern Pakistan on Wednesday, killing five suspected militants, two Pakistani intelligence officials said.

It was the second strike this month targeting Pakistani Taliban and foreign militants seeking sanctuary in the North Waziristan tribal region bordering Afghanistan.

The unmanned aircraft fired missiles at a vehicle in the Qutab Khel area of Miran Shah, the main town in the region. The slain insurgents were from Uzbekistan, the officials said.

The officials, who spoke on condition of anonymity because they were not authorized to speak to the media, provided no further details and said their agents were still trying to get more details.

North Waziristan is too dangerous for outsiders to visit and independently confirm the attacks. U.S. officials do not acknowledge firing the missiles, much less discuss who they are targeting.

Insurgents based in North Waziristan are blamed for attacking U.S. forces in Afghanistan.

There were at least 20 such U.S. missile strikes in the region in October.

Government officials were not immediately available for comment. Pakistan has publicly denounced the drone attacks and urged Washington to transfer technology to Islamabad so that its military could launch any such attacks.