By Elizabeth Hur

PHILADELPHIA (CBS) – Authorities say two men were injured Sunday night after a building collapsed in the Ogontz neighborhood of Philadelphia.

READ MORE: Dr. Mehmet Oz, Dave McCormick Race Heads into Recount In Pennsylvania Senate Primary

According to authorities, the two-story vacant home collapsed just before 8 p.m. near the intersection of Ogontz Avenue and Limekiln Pike.

“The middle of the building is sagging and it could have been from the weather, the change in temperature. I just don’t know,” says Fire Captain Clifford Gilliam.

Two men who were reportedly walking by at the time of the collapse were transported right away to Einstein Hospital. The extent of their injuries in unknown at this time, but it is believed they may have been hit by falling debris.

Neighbors that spoke with CBS3 Eyewitness News didn’t see the crash, but they felt it:

READ MORE: WATCH LIVE: DA To Provide Significant Update On 1991 Murder Of Joy Hibbs In Bristol Township

“It was nice and everybody was out and, boom, it just shook my apartment and I live right behind the building, so it shook my apartment and that’s why they told me to get out because they were worried that buildings going to continue to fall,” Michael Scott says.

Neighbors add it’s incredible that more people didn’t get hurt. They say the building is used to house medical offices, but that it’s been vacant for years.

L&I officials are on the scene surveying the damage. Demolition Crews have been called to tear down the rest of the building.

The cause of the collapse remains under investigation.

MORE NEWS: Philadelphia's Chief Of School Safety Kevin Bethel Speaking Out Following Texas School Tragedy: 'Fear In Our System Is Real'