At least one trapped after truck and two cars collide on major Sydney road

At least one person is trapped after a truck and two cars crashed on a major road in Sydney's south-west.

The accident happened on Campbelltown Road near Ben Lomond Road in Minto about 3pm today.

A woman in her 30s is trapped in one of the cars with leg injuries.

A man in his 40s is believed to have suffered leg injuries. The driver of the truck is uninjured.

Campbelltown Road is closed in both directions between Williamson Road and Anderson Road.