Pakistani intelligence officials say a U.S. drone strike has killed four militants in the country's northwest, the third such attack in less than two days.

Officials say missiles struck a vehicle Friday as it traveled near the town of Miran Shah in the North Waziristan tribal region.

The day before, a drone strike in the same region killed a ranking member of the militant Haqqani network. A U.S. official in Washington described Janbaz Zadran, also known as “Jamil,” as the senior most Haqqani leader in Pakistan to be taken off the battlefield.

Pakistani officials said the man killed in Thursday's attack in North Waziristan was an important Afghan commander of the al-Qaida-linked militant network and a close aide to the group's leader, Sirajuddin Haqqani.

The Haqqani network, which has launched numerous attacks in Afghanistan, is believed to be based in North Waziristan.