ISLAMABAD , Pakistan ( CNN ) -- A suspected missile strike from a U.S . Predator drone killed at least four people in a house in Pakistan 's North Waziristan region early Saturday . Marchers protest recent U.S. missile strikes on the Pakistani tribal areas . The attack , which occurred in the Mir Ali subdivision in the village of Ali Khel , was one of several to hit the country Saturday . Six people were injured in Saturday 's attack , the fourth suspected U.S. strike on Pakistani soil in November . The names of the victims have not been released . It is also not known why the house was targeted . Elsewhere , three people were killed and 11 were injured in an explosion inside a mosque in northwest Pakistan 's tribal region , a government official said . The explosion happened just after 4 p.m. ( 6 a.m . ET ) , leaving the Hangu district mosque inside Pakistan 's North-West Frontier Province in ruins , said Omer Faraz Khan , deputy superintendent of Hangu . He said rescuers were trying to save people trapped under the debris . It was not immediately clear how many people were inside the mosque at the time of the blast . Police were investigating the explosion , which was detonated using a homemade timer , Khan said . Hours later , three bombs exploded about 10 p.m. ( noon ET ) outside a stadium in Lahore where a music festival was being held , police Inspector Muntzir Kazmi said . A 13-year-old was injured , but it was unknown whether the victim was a boy or girl . This week , Pakistan 's Foreign Ministry summoned U.S . Ambassador Anne Patterson to lodge a formal protest against another suspected U.S. missile strike on its territory , an act Pakistan Prime Minister Yousaf Raza Gilani called a violation of his nation 's sovereignty . Watch Gilani say his country has had enough of U.S. attacks » . Wednesday 's strike in the Bannu region of Pakistan 's North-West Frontier Province left five dead and seven wounded . That attack was farther inside Pakistani territory than previous attacks . The attack targeted a home outside the tribal areas that U.S. intelligence says have become a haven for Taliban and al Qaeda fighters battling U.S. and NATO troops in neighboring Afghanistan . The U.S. government has not acknowledged hitting targets within Pakistan , an ally in the war on al Qaeda launched after the September 11 attacks on New York and Washington . However , Pakistan 's government has repeatedly complained about the strikes . Gilani took to the floor of the parliament and renewed his condemnation of the attacks Thursday but added that he thinks they will be controlled when President-elect Barack Obama takes office . In October , the foreign ministry summoned Patterson to lodge a `` strong '' protest on continuing missile attacks and said they should be stopped immediately . At the time , a missile strike from a suspected U.S. drone on a compound in South Waziristan killed 20 people . Pakistan 's government said the attacks cost lives and undermine public support for its counterterrorism efforts . The U.S.-led coalition and NATO , based in Afghanistan , have been seeking a way to effectively battle militants who are launching attacks from Pakistan 's swath of tribal areas along the border . They have become frustrated with Islamabad over the years , saying it is not being active enough against militants , a claim Pakistan denies . The United States is the only country operating in the region known to have the capability to launch missiles from drones , which are controlled remotely .
NEW : Teen killed when Four bombs explode outside music festival . three killed after suspected U.S. missile strike fired from drone , official says . Attack believed to be fourth in U.S. since early November . Hangu bombing leaves at least three people dead in northwest .