MIT Alert: Man in Body Armor Carrying Long Rifle

From MIT Emergency Office:

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 at 617 253 1212 or dial 100 from a campus phone.  More updates to follow.

UPDATE:

Cambridge police tweet:

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

UPDATE 2:

MIT all clear. There's no dangerous crazies harming people. Apart from all the central bank governors educated there. online.wsj.com/article/SB1000…
— Faisal Islam (@faisalislam) February 23, 2013