A group of 75 Taliban insurgents tried to overrun a U.S.-led coalition base in southern Afghanistan on Tuesday, a rare frontal attack that left more than 20 of them dead, the coalition said in a statement. The insurgents attacked Firebase Anaconda from three sides, using gunfire, grenades and 107 mm rockets, the coalition said. A joint Afghan-U.S. force repelled the attack with mortars, machine guns and air support, CNN reported. "Almost two dozen insurgents were confirmed killed in the attack," the statement said. Two girls and two Afghan soldiers were wounded during the fight in Uruzgan province, it said.