Story highlights

Officials: The suspected drone fires on a suspected militant's vehicle

The United States rarely discusses the CIA's drone program

Islamabad, Pakistan CNN  — 

A suspected U.S. drone strike in Pakistan’s tribal region killed four people Sunday, intelligence officials told CNN.

Two Pakistani intelligence officials said the suspected drone fired two missiles on a suspected militant’s vehicle in the area of Datakhel of North Waziristan.

North Waziristan is one of the seven districts of Pakistan’s volatile tribal region bordering Afghanistan.

The intelligence officials asked not to be named because they were not authorized to speak to the media.

U.S. officials rarely discuss the CIA’s drone program in Pakistan, though privately they have said the covert strikes are legal and an effective tactic in the fight against extremists.

Journalist S.K. Khatak contributed to this report.