A 20-year-old woman was fatally shot inside a Bronx apartment building on Wednesday night, police said.

The victim was found by cops at about 10:10 p.m. with a gunshot wound to the head in a third-floor unit at a building on Hull Avenue near East Gun Hill Road in Norwood, cops said.

She was taken to Jacobi Medical Center, but could not be saved, authorities said.

No arrests were made by early Thursday morning, said police, who did not immediately provide a description of a possible suspect.