Three unauthorized US drone strikes kill at least 21 people in South Waziristan in northwestern Pakistan.
A barrage of non-UN-sanctioned US drone strikes have killed at least 21 people and wounded several others in Pakistan's South Waziristan's tribal region near the Afghan border.
In two consecutive assaults, US drones fired four missiles at a religious seminary and a house in Shalam Raghzai and Wacha Dana areas respectively, killing at least 17 people and injuring several others early Monday, local sources told a Press TV correspondent.
Shortly after the second attack, two more missiles were fired at a vehicle in Shawal area of south Waziristan region in northwestern Pakistan and left four more people dead, bringing the death toll to 21.
The number of casualties is expected to rise as many of the injured are said to be in critical condition.
Meanwhile, seven foreigners were also reportedly among the killed people, but their identities are not known.
The strikes came in the wake of a similar attack in the tribal border region in less than a week. On Thursday, a missile attack targeted a suspected militant compound in Wana, allegedly killing at least eight militants.
Islamabad has repeatedly criticized the unauthorized US drone attacks in Pakistan as violations of the South Asian country's sovereignty.
Earlier this week, thousands of Pakistanis staged a demonstration in the port city of Karachi, calling for an end to the non-UN-sanctioned US air strikes in the country.
Washington claims the air strikes target militants. However, according to numerous figures, the attacks have killed hundreds of civilians in Pakistan since 2008.
The issue of civilian casualties has strained relations between Islamabad and Washington with the Pakistani government repeatedly objecting to the attacks.