Police are investigating why a man stormed into the CBC building with a handgun early yesterday as he set off a five-hour standoff with police.

Duty Insp. Chris Butler said the visibly distraught man entered the CBC news building on Westmount Boulevard near Memorial Drive just before 2 a.m. yesterday.

“He was in the foyer because he got in the front door, but he couldn’t get into the second door because it was locked. Nobody was in harm’s way and he was in the foyer alone,” Butler said yesterday.

“We’re not sure what his motives are and we’re looking into it, but it doesn’t look like he was a former employee of CBC.”

Police negotiators were able to get the man to surrender peacefully just before 7 a.m.

The man is now undergoing a psychiatric assessment to determine his state of mind and if he has emotional or mental issues.

Charges are pending against the man who is believed to be in his early 70s.