Three NYPD employees — including a detective and a patrolman — were arrested in separate incidents Sunday, according to police.

Detective Joel Crooms, 33, was busted at home on Staten Island around 7:30 p.m. for allegedly beating his daughter with a belt, cops said. He was charged with assault and acting in a manner injurious to a child.

Three hours earlier, Officer Jose Joseph was arrested at his Bronx home for allegedly choking his girlfriend during an argument, police said.  Joseph, 38, was charged with second-degree strangulation.

A third department worker, Principal Administrative Associate Kathleen Mccormick, 67, was arrested at around 2:45 p.m. Sunday for allegedly shoplifting at a Target in Brooklyn, police said. The clerical worker was charged with petit larceny and criminal possession of stolen property.

All three employees were suspended without pay, authorities said.