Police were called to Donovans Road in Wye around 12:30 p.m. Friday after receiving a call about an accident involving a lorry and a car.
A 36-year-old man, a six-year-old boy and a five-year-old girl were taken to hospital with minor injuries.
The truck driver, a 58-year-old man, was uninjured.
He helps the police with their investigation.