Police seek witnesses after cyclist injured in crash on Monarto Road, Rocky Gully

Police are seeking witnesses after a road accident on Monarto Road at Rocky Gully sent a cyclist to hospital on Wednesday.

The cyclist was allegedly side-swiped by the driver of a red Holden Jackaroo in the 100 kilometre per hour zone around 8.15am on Wednesday.

He was airlifted to hospital in Adelaide with serious injuries, reportedly including a broken forearm and thighbone, though his daughter told The Standard he was "going to be okay".

Police believe several other drivers passed the cyclist on the same stretch of road before the accident, and would like to speak with them.

Earlier

Paramedics are tending to a cyclist hit by a car on Monarto Road at Pallamana just after 8.15 this morning.

A rescue helicopter was dispatched at 8.45am and is expected to take the man, believed to be aged in his 60s, to hospital in Adelaide.

An SA Ambulance Service spokeswoman said the man had suffered fractures, but was conscious and talking.

SA Police have closed Monarto Road while emergency services remain at the scene.

Motorists should take an alternative route.