Riverhead police are investigating a motor-vehicle accident in Wading River that injured four people, including at least one who was airlifted, a police spokeswoman said Monday.

A call for an accident with an overturned vehicle near Fink's Country Farm Stand at 6242 Middle Country Rd. was received at 7:45 a.m., police said.

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Middle Country Road was closed until just before 12:30 p.m., police said, as Suffolk County's Aviation Unit transported at least one injured person to Peconic Bay Medical Center in Riverhead.

A police spokeswoman later said four people were hurt, but she had no details on the injuries or the accident.