WOODBURY - A vacant school building in Lake Grove went up in flames yesterday, and police say the fire was intentionally set.

A building at Lake Grove School, located on Moriches Road, went up in flames Friday afternoon.

Earlier in the month, a fire damaged a different building on the same property. It's unclear if arson is suspected in that case.

No injuries were reported in both incidents. 

The special-education school was shut down last year due to financial troubles.