NEW YORK — A man who was walking down a street outside a school near Central Park was shot in the back of the head Monday and lay mortally wounded in a pool of blood as his killer escaped with a getaway driver, police said.

The shooting occurred around 2 p.m. outside the Saint Thomas Choir School, a small boarding school for young boys on a fairly quiet street between busy avenues teeming with tourists and shoppers.

The gunman, wearing a dark coat with a dark hood and khaki pants, came up behind 31-year-old Brandon Lincoln Woodard, of Los Angeles, and fired what appeared to be a silver semi-automatic pistol, striking him once, police spokesman Paul Browne said.

No motive had been revealed.

Unlimited Digital Access. $1 for 4 weeks.

It’s believed the shooter and the getaway driver may have been in the neighborhood, just blocks from Central Park and Columbus Circle, for some time.

The suspects escaped in a light gray or silver Lincoln sedan.

The killing occurred on a nondescript, unassuming block of West 58th Street, with construction scaffolding, a piano store and an apartment building at the corner.

None of the 38 boys studying at the school witnessed the shooting because they were at a church rehearsing, school receptionist Allie Roma said.