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. -LRB- noon ET -RRB- 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 Â '' 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
ISLAMABAD , Pakistan -LRB- CNN -RRB- -- 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. -LRB- 6 a.m. ET -RRB- , 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