UPDATE | Attackers had more than 1,600 bullets with them in Calif. shooting

SAN BERNARDINO, Calif. (AP) — Police say the attackers who killed 14 people and wounded 21 others at a banquet in Southern California had more than 1,600 bullets with them when they were gunned down in their SUV.

San Bernardino Police Chief Jarrod Burguan said at a news conference today that the shooters had more than 3,000 rounds of ammunition at their home, 12 pipe bombs and hundreds of tools that could be used to make improvised explosive devices.

Burguan says Syed Farook and his wife Tashfeen Malik sprayed the room at a social service center in San Bernardino with bullets but police didn't know if any one person was targeted.

Authorities say the woman who helped her husband kill 14 people a banquet at a social service center in Southern California had a Pakistani passport and came to the U.S. on a fiancee visa.

David Bowdich, assistant director of the FBI's Los Angeles office, says Farook, a U.S. citizen, traveled internationally and entered the U.S. with Malik in July 2014.

He said at a news conference the bureau doesn't know all the countries Farook went to and that a motive for the shooting is not yet known.