Two parents were arrested Saturday after their one-month-old baby boy was found dead on Staten Island, police and police sources said.

Cops responding to the West Brighton Houses at around 6:45 a.m. Saturday found the “unconscious and unresponsive infant,” who had “visible signs of trauma to the left arm,” authorities said.

EMS transported the baby to Richmond University Medical Center, where he was pronounced dead.

Leonard and Jenice Lightfoot were both charged with first- and second-degree reckless endangerment, the NYPD said.

Sources confirmed that the pair, aged 38 and 36, respectively, are the baby’s parents.

The Office of the Chief Medical Examiner will determine the cause of death and the investigation remains ongoing, authorities said.