EAST HARTFORD — Two brothers, ages 16 and 18, were killed in a one-car crash early Sunday morning, police said.

Robert Swain, 18, of 235 Main St., East Hartford, was pronounced dead at the scene, police said in a statement released Monday evening. His brother, Landrew Swain, 16, of 33 Delmont St., Manchester, was taken to Hartford Hospital, where he was pronounced dead, police said.

They said the driver of the car, an 18-year-old male who was not identified, was not injured but was taken to St. Francis Hospital and Medical Center as a precaution.

The fourth occupant, a 20-year-old male who also was not identified, was seriously injured, police said, and was taken to Hartford Hospital.

The accident happened about 4:15 a.m. Sunday. Police said a green BMW was found on the front lawn of 380 Forest St., with four people inside.

In a statement Monday evening, Mayor Marcia Leclerc said, “Our hearts are heavy for the loss of these young men. Our thoughts and prayers are with their family and we stand ready to ensure that our community has the professional support needed to grieve.”

The Mid-State Accident Reconstruction Team, which includes officers from Berlin, Cromwell, Newington, Rocky Hill and Wethersfield, responded to the scene to help East Hartford police.

The investigation is ongoing and is being conducted by the East Hartford Police Department.