An NYPD officer was among three city workers busted overnight in domestic incidents, cops said Friday.

Officer Rafal Korycki, 29, was arrested around 6 a.m. Friday and charged with criminal mischief after a fight with his ex-wife, also a cop, at her home in Brooklyn, police said.

Korycki allegedly caused minor damage to his ex’s bedroom door during the dispute.

About an hour earlier, a 50-year-old NYC Transit employee, Rodney Diaz, was taken away in cuffs after he allegedly threatened to hit his girlfriend with a baton while at her home in Mott Haven in The Bronx, police said.

Diaz was charged with menacing, aggravated harassment and criminal possession of a weapon, according to the NYPD.

Cops said they also arrested a 33-year-old EMT late Thursday night in The Bronx.

Robert Soto allegedly hit his girlfriend multiple times while at her apartment in the Morrisania neighborhood around 11:45 p.m., police said.

The EMT was charged with assault, and his girlfriend was treated for bruises and cuts, cops said.