A Brooklyn couple were found dead in their NYCHA apartment on Friday, police said.

The badly decomposed bodies of the victims — a 54-year-old man and a 59-year-old woman — were found by cops conducting a wellness check at the Bayview Houses in Canarsie at about 3 p.m., cops said.

The man was found inside the bathtub, while the woman on the bedroom floor, police said.

It’s believed the victims have been dead for up to week, police sources said.

They were pronounced dead on scene.

The door to the couple’s fourth-floor apartment was locked before they were discovered, sources added.

Police weren’t immediately sure how the two died and are still investigating. The city medical examiner will determine the official cause of death.