Cambridge police: 'No threat to public safety' at MIT

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MIT's campus was put on lockdown earlier this morning after a report of a gunman on or near campus, but Cambridge police later said their search of a campus building turned up empty.

Police sounded the all-clear at 10:19 a.m.

Scene is clear. Call unfounded. No threat to public safety in #CambMA #MIT

— Cambridge Police (@CambridgePolice) February 23, 2013

This release was issued earlier by MIT officials:

This morning information was received from Cambridge Police that there was a person with a long rifle and body armor in the Main Group Building of MIT. Multiple law enforcement agencies have responded, stay indoors and shelter in place and report suspicious activity to the campus police dispatch dial 100. More updates to follow.

The scene is being cleared, according to this tweet:

.@breesison on scene at #MassAve: Oofficers taking off bullet proof vest. Crime scene tape coming down. no one transported. #MIT

— AndreaWBZ (@AndreaWBZ) February 23, 2013

Before 10 a.m., Cambridge police tweeted that their search of the building turned up empty.

Police responded to report of man w/ gun inside building on Mass Ave. Police searched building w/ negative results. Will update w/ more info

— Cambridge Police (@CambridgePolice) February 23, 2013

Boston Globe partner WBZ-TV has a report stating a man was seen with a gun along Massachusetts Avenue in Cambridge, according to that city's police force.

Here is the Cambridge police tweet on the report of a gunman on Massachusetts Avenue at about 7:30 a.m.

02/23/13 07:28 REPORT OF POSSIBLE PERSON WITH GUN ON MASSACHUSETTS AVE IN #CAMBMA

— Cambridge Police (@CambridgePolice) February 23, 2013