SAN FRANCISCO (CBS SF) — BART closed the 16th Street Mission station in San Francisco earlier Sunday afternoon because a person was talking about explosives and possibly blowing up a train, a BART police lieutenant said Sunday.

BART officials said they closed the station at about 3:30 p.m. The station is located at the corner of 16th and Mission streets.

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The station is now open as BART police investigate the incident, police Lt. Paul Kwon said. Kwon said police closed the station as a precaution and officers and K-9s searched it for explosives.

Neither officers nor K-9s found anything suspicious, Kwon said.

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Police haven’t arrested anyone, but “we are talking to a person of interest,” Kwon said.

BART officials said at 4:16 p.m. that the station is open and trains are making all stops in San Francisco.

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