Ambulance New Brunswick has launched an internal investigation following an accident that sent two paramedics to hospital early Sunday.

An ambulance responding to a single-vehicle accident was travelling on Route 617 in Burtts Corner when it went into a ditch and overturned, ejecting one of the paramedics, the RCMP said in a news release.

Local residents called for help at 12:30 a.m. and provided first aid to the paramedics until Keswick Valley volunteer firemen and paramedics from Ambulance New Brunswick arrived at the scene, the RCMP said.

The injured paramedics were taken to Dr. Everett Chalmers Hospital in Fredericton.

"One paramedic has been released from the hospital. The second paramedic has been admitted," said Ambulance New Brunswick communications officer Sophie Cormier-Lalonde.

It is policy at Ambulance New Brunswick to have an internal investigation when there's an accident involving its staff and vehicles, said Cormier-Lalonde.

She said a second ambulance was sent to the traffic accident the first one was meant to attend.