A 23-year-old man is in police custody after a woman was allegedly assaulted in an apartment building on the west side of Saint John overnight Friday.

Sgt. Chuck Elgee said police received a call about a 19-year-old woman screaming from inside one of the units around midnight.

When they arrived the officers said the man was assaulting her.

She was taken to hospital, but police said she’s expected to be okay.

It's not clear if the suspect and victim knew each other.