HOLYOKE, Mass. (WWLP) – A 24-hour police guard is posted outside what’s left of the old Holyoke Armory building, after a major collapse Monday night.

Much of the brick wall and roof collapsed on the Pine Street side of the building at about 6:05 p.m. Monday. No one was hurt.

The building was originally built at 163 Sargeant Street in 1907. It’s been abandoned for more than 10 years, and has a big red “X” sign attached, indicating that it had been condemned and was slated for demolition at some point.

Lt. Isaias Cruz told 22News the police guard has been posted for the safety of the public. “It’s to keep curiosity seekers out, and to keep people from taking souvenirs that that they’re not authorized to take.”

Lt. Cruz said the police guard will also protect the property next door.  The Holyoke building inspector determined that the multi-family house next door is in danger because of the collapse.  As a result he ordered approximately 15 people to vacate the five apartments in that building.  The Red Cross is assisting the displaced families.

Lt. Cruz said police will be posted on-site until barriers can be erected and the city decides how they’ll proceed with the demolition. Also, Pine Street is closed to through traffic from Sargeant Street to Hampshire Street.

The last notable building to collapse in Holyoke was the former Essex House hotel in downtown Holyoke, in December of 2014. That building has since been demolished.