Two men sleeping in the abandoned Oretha Castle Haley Elementary School at Franklin Avenue and North Robertson Street reported being attacked by a group of 15-20 masked assailants, New Orleans police said Tuesday.

The assault reportedly occurred around 12:23 a.m. on Tuesday. Both men were asleep, they told police, when the attackers entered the school and stabbed them. Both men were taken to a hospital.

Police were not able to offer any further details on the reported attack Tuesday morning.

The old elementary school, damaged in Hurricane Katrina, has been known as a squatter site for years. It is adjacent to the Press Street rail yards. The school board sold the building to a developer in 2013.