SAN BERNARDINO – At least 14 people were killed in a gun attack on a holiday party in California on Wednesday, triggering a massive manhunt that ended when police shot dead two heavily armed suspects – a man and a woman – on a quiet residential street. San Bernardino police said a possible third suspect had been detained over the shooting, which took place at a social services building about an hour’s drive east of Los Angeles. The worst mass shooting to hit the United States in three years, the massacre drew an angry response from President Barack Obama, who once again urged Congress to pass tougher gun control measures to stem the spiral of violence. The attackers were dressed in military-style gear and carried assault weapons as they burst into the auditorium where the bloodbath took place, lent out for the holiday party by the Inland Regional Center. Beyond the 14 dead, the shooting left at least 17 people wounded, including 10 in critical condition. No details have yet been released on the victims’ identities, although police said they were not thought to include any children. David Bowdich, assistant director of the FBI’s Los Angeles office, said authorities were not ruling out terrorism. “I’m still not willing to say we know that for sure,” he told journalists. Police chief Jarrod Burguan said authorities were looking at reports the shooting might be linked to a disgruntled employee taking part in the party. “There was some type of dispute or something when somebody left the party, but we have no idea if those are the people that came back,” Burguan said.