UPDATE— Police say two suspects, one male and one female, are dead after the shooting at a Southern California social services center that left at least 14 people dead and more than a dozen wounded.

San Bernardino Police Chief Jarrod Burguan also said at a news conference Wednesday evening that authorities found what they believe is an explosive device at the Inland Regional Center in San Bernardino. Bomb squads were working on it. The FBI says it's a possibility that the shooting is "terrorism."

Burguan says the suspects were wearing "assault-style clothing" and were both armed with assault rifles and handguns.

Police say a person was detained who was seen running near a gunbattle between officers and two suspects of a deadly shooting at a Southern California social services center. That person's connection is unclear.

 

UPDATE 5 p.m. EST: KTLA reports that 14 people were killed and 14 wounded, possibly more, according to San Bernardino police chief Jarrod Burguan.

Police are searching for a black SUV that fled the scene after the shooting, though it is unclear if that vehicle was carrying the suspects or witnesses fleeing.

UPDATE 4:15 p.m. EST: Multiple victims have been taken to a Loma Linda University Medical Center, with more expected.

"There are multiple casualties, including fatalities," Sgt. Vicki Cervantes, a police spokesperson, told the San Bernardino Sun.

The shooting suspects may have been wearing ski masks and military-style vests, according to witnesses.

UPDATE 3:30 p.m. EST: The Los Angeles Times reports that Sgt. Cervantes "told reporters at the scene up to three shooters were reported inside the Inland Regional Center." Their precise whereabouts are uncertain.

The shooters were heavily armed and possibly wearing body armor. A SWAT team is now going door-to-door to try to clear the building.

The original post begins here: 

Early reports indicate that a shooter or shooters may have opened fire in San Bernardino, California, about 60 miles east of Los Angeles, possibly injuring or killing up to 20 people. Police say they are looking for one to three suspects.

ABC is reporting that the shooting occurred at "the Inland Regional Center, a nonprofit that works with individuals with developmental disabilities, at 1365 S. Waterman Avenue."

News station KTLA in Los Angeles has a livestream up and running.

This post will be updated as further information comes in.