BUFFALO, N.Y. — Buffalo Police tell 2 On Your Side an Internal Affairs investigation is underway after an officer's rifle fell off a roof and onto a sidewalk during the St. Patrick's Day Parade on Sunday.

“This is something that doesn't happen, can’t happen, nor I've never heard of this happening,” said Joseph Gramaglia, Buffalo Police commissioner.

Pictures shared with WGRZ by a viewer show the officer positioned on top of the building at 560 Delaware Avenue at Allen Street in downtown Buffalo. The rifle is perched on the edge, on top of a stand, a short distance from the officer.

Gramaglia told 2 On Your Side that the officer was acting in an overwatch position, a security measure that offers the department a vantage point during mass gatherings. He said an ongoing investigation by th

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