Palestinian medical officials say two more teenagers have died from wounds they sustained in Gaza's deadliest day of fighting in the past month. The two, ages 16 and 17, died on Sunday. A Palestinian health official says both boys were wounded Wednesday, by a tank shell that also killed a Reuters TV cameraman. That would bring the total number of Palestinians killed in that shelling to six. A relative of one the boys who died Sunday confirmed he had been wounded in that incident. Human rights groups have asked the military to investigate the firing of the tank shell.