Two gunmen have been shot dead after an active shooter situation at a San Diego mosque drew a massive police presence, police sources told The Post Monday. One member of the mosque was also killed in the attack, according to the Council on American-Islamic Relations. The alleged gunmen have been identified as 17-year-old Cain Clark and 19-year-old Caleb Velasquez, according to a law enforcement source. At least one of the suspect’s took a weapon from their parent’s home, and left a suicide note that talked about racial pride, a law enforcement source told The Post.