Three people were gunned down while they were sitting inside parked cars in two separate incidents in Queens Monday evening, police said.

The bloodshed kicked off at about 3:45 p.m. when a gunman blasted a 21-year-old man while he was sitting in his white Dodge Charger on Springfield Boulevard and 140th Avenue in Laurelton, cops said.

Medics rushed him to Jamaica Hospital where he died.

Police were investigating if the victim had been involved in a robbery earlier in the day, a police source said.

Investigators were also probing if the shooting was carried out by gang members in retaliation for the robbery, a source said.

Hours later, two other men were fatally shot while sitting in a grey 2018 Kia with New Jersey license plates on 255th Street near 149th Drive in Rosedale, police said.

Both men were shot multiple times in the chest and declared dead at the scene, authorities said.

Witnesses described a hectic scene following the shooting.

“There was about five shots. Pop. Pop. Pop,” a 57-year-old neighbor named Sam said.

“One guy was laid back like he’s sleeping and the other guy’s just sitting in his seat.”

Another neighbor said she saw a white car speed away from the scene after the shooting.

“I jumped up and went to the window,” said Brenda, 63, who lives on 155th Street.

“All I seen was a white car running around the corner real fast. A white SUV speeding off toward Craft Avenue. Pretty fast — real fast,” she said.

No arrests have been made in either of the shootings, cops said. Police do not suspect the two incidents are related, a police source said.