At least four people were killed in the latest U.S. drone strike in northwest Pakistan's North Waziristan tribal area on Monday morning, local media reported.

According to the private TV channel Express, U.S. drones fired six missiles on suspected militants hideouts, leading to four killed and several others injured.

The identities of the killed have not been known yet.

The U.S drones regularly hit hideouts of the militants in the Pakistani tribal region, which Washington considers as the center of Taliban and al-Qaida remnants. More than 80 people have been killed in such strikes since the beginning of this year

Pakistan opposes the U.S. strikes inside the country's tribal regions.