Arson can’t be ruled out as a cause of the fire that destroyed the abandoned St. Anthony Convent and Motherhouse in Syracuse Friday night, city officials said Monday during a press conference. 

Syracuse Fire Chief Michael Monds said it took more than 24 hours to extinguish the fire.

"This fire was one of the largest our department has faced in decades in terms of the size of the building and the volume of fire that we faced," Monds said. 

Police Chief Joe Cecile said the investigation into the massive blaze continues. Arson has not been ruled out.

"We have talked with witnesses, we had a few folks from the community who believe they saw something suspicious occurring prior to the fire," Cecile said.

The investigation includes looking at security camera footage that shows the campus.

The department will also use drones to assist in the probe because the building remains too dangerous for people to enter.

There were plans to build much-needed affordable housing units in the building and on other parts of the campus. Deputy Mayor Sharon Owens said the fire won’t change the plans.

"We are still going to be moving forward on this project and the commitment we have to this community," said Owens. 

City officials urge residents to stay away from the property for safety reasons.