Updated

Pakistani intelligence officials say suspected U.S. drone-fired missiles have hit a house in the country's northwest, killing two militants.

Two intelligence officials say the missiles in the South Waziristan tribal region hit a house in Azam Warsak village early on Thursday.

They say the house was occupied by Arab militants affiliated with al-Qaida. The officials spoke on condition of anonymity because they are not authorized to speak to media.

South Waziristan is considered as a sanctuary for local and al-Qaida-linked insurgents. The Pakistani army has carried out a massive operation there but militants still have hideouts in some pockets.

U.S. drone strikes are widely unpopular in Pakistan and are seen as a violation of national sovereignty. Washington has long used them to target militants in areas inaccessible to Pakistan's army.