PHILADELPHIA - Philadelphia Mayor Jim Kenney called for action on Friday called for action after three separate shootings in one day left three people dead and six others injured.Two of those killed were teenagers.The gunfire began Thursday afternoon when a 17-year-old boy and a 24-year-old man were killed in a shooting that also wounded a 30-year-old and a 19-year-old man, police said.The violence continued when a gunman opened fire near a rec center’s basketball court, police said.