SAN FRANCISCO (AP) -- The FBI has issued a nationwide alert to law enforcement agencies about a San Francisco social media consultant they consider armed and dangerous who is wanted on suspicion of possessing explosives.
FBI spokesman Peter Lee said Sunday 42-year-old Ryan Kelly Chamberlain, II, was last seen in a dark blue, hooded sweatshirt and jeans.
Multiple agencies, including hazardous materials crews, searched Chamberlain's apartment in San Francisco's Russian Hill neighborhood on Saturday, blocking off the street to vehicle and pedestrian traffic for much of the day.
Lee gave no details Sunday about the nature of the investigation, but said authorities believe Chamberlain is acting alone.
“We believe he is alone in the vehicle but we just don't know, again, where his ties or his network is so we ask that any members of the public be on the lookout for anyone that matches this man's description,” Lee said at a press conference outside FBI headquarters on Sunday.
Chamberlain is white, 6 feet 3 inches tall and 225 pounds with brown hair and blue eyes. He is traveling in a white 2008 Nissan Altima with Texas or California license plates, but authorities do not know where he is heading, Lee said.
Randy Bramblett, a personal trainer and professional athlete in San Francisco, said he became friends with Chamberlain through Project Sport, a local sports marketing company. The company let Chamberlain go when it was sold in November and he soon lost touch with friends and stopped returning calls and messages, Bramblett said.
“We all knew that he was a very emotional guy and when he didn't get his own way he would say `Screw you, I'm going to go do my own thing,”' Bramblett said. “I've never seen him be violent, ever, but I would definitely say that maybe emotionally and mentally he was a little unstable.”
Chamberlain had worked for years as a political consultant on Democratic campaigns, Bramblett said.
He also worked as an independent contractor for The San Francisco Chronicle during the 2012 NFL season, doing social media to boost coverage for the San Francisco 49ers Insider iPad app, the newspaper said.
On Saturday, hazmat crews were hosed down after leaving the two-story, gray 1970s-era building on Jackson Street. Some residents were also kept from entering their homes while the search was underway.
The affidavit and search warrant used to enter Chamberlain's home remain under seal.
Reporter Garance Burke can be reached at http://www.twitter.com/garanceburke