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All Clear – 7:50 p.m. – Police have determined there is no threat to the community. Buildings are open. All clear.

Update 3 – 6:35 p.m. –  There continues to be no indication of an active threat to the community. Police continue to investigate. Please stay away from Angell and Mason Halls.

Update 2 – 5:32 p.m. – There does not appear to be an active threat to the community. DPSS continues to investigate. Continue to stay clear of area.

Update 1 – 5:17 p.m. – Unconfirmed reports of an active shooter, officers are in the area checking. Stay away from the area of Mason Hall.

Original – 4:40 p.m. –  UM EAlert Ann Arbor: Active shooter in Mason Hall. Run, hide, fight.

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