A Uniondale man is facing arson charges after allegedly starting a fire in a New Cassel apartment complex.

Police say Dimitrov Henry started a fire on Prospect Avenue around 2:30 a.m. Saturday.

They say 20 people had to be evacuated from three units until the fire was extinguished.

No injuries were reported.

Detectives say Henry had already been taken into custody before completing their fire investigation for allegedly harassing a 21-year-old woman.