This was the moment a baby was left covered in shards of broken glass after a cyclist smashed a car window in an apparent road rage row.

Shocked mum Rhiannon Gautama posted the photo on Facebook in the aftermath of the incident.

She said the cyclist hit the rear window of her car with his bike lock possibly in retaliation for not having enough space in the road.

Her four-month-old baby thankfully was unhurt in the attack and slept the whole way through.

Ms Gautama later wrote on Facebook: "The cyclist had hit our car with his hand earlier on the passenger side, the only reason I could think he did this is he possibly felt he didn't have enough room to get through.

"There were L plates on the car and my partner was driving.

Rhiannon Gautama
Shocked: Rhiannon Gautama and her partner Barnaby Reardon were astounded

"As we passed him again I said out the window we have L plates, have consideration.

"He caught up again as we hit traffic, he switched to the other side and smashed our car window with his bike lock.

"Due to the the shock I told my partner to carry on driving to a safe place to pull over and called the police.

"There was glass over our child. We have a baby on board sign and there was a child sunscreen."

Report: The incident, which happened on Croydon Road in south London, has been reported to police

Her Facebook post was shared more than 8,000 post and attracted more than 1,000 comments from appalled users.

The incident happened at around 8:40am on Croydon Road between Croydon and Mitcham in south London yesterday morning.

Ms Gautama, who has reported the incident to police, said the man was between 30 and 40, white and with long, blond hair.

She said he was wearing a yellow jacket and cycling glasses.

The Metropolitan Police have not yet commented.