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Gunfire rang out following the second strike.
Early on Sunday, government spokesman Mussa Ibrahim said that Seif al-Arab Qadhafi, one of the Libyan leader's sons, and three of his grandchildren were killed in a NATO airstrike that he termed a bid to assassinate the strongman.
An international coalition began carrying out strikes on forces loyal to Qadhafi on March 19, under a United Nations mandate to protect civilians in the country. NATO took command of operations over Libya on March 31.