An attempted carjacking at 4.15 on Monday morning has left a Cheltenham man with a badly broken leg and bruised eyes.

John Yosifidis had parked his delivery van while dropping off two boxes of doughnuts to a United service station in Altona North, where he was attacked by a thief.

CCTV footage shows the 62-year-old victim driving his van into the station just as another van with three thieves drove into the station.

While Mr Yosifidis was inside the store, one of thieves climbed out of the van and attempted to steal the delivery vehicle that was running with the keys left in the ignition.

The victim says he saw the scene unfolding while in the store. In an attempt to stop the theft, he ran and grabbed the keys, throwing them away from the van.

“I opened the door, he was saying something, I grabbed the keys and he started punching me,” Mr Yosifidis told 9NEWS, after which the van drove over his foot, trapping him.

“Somehow the van moved on top of my foot… I tried to move the van to lift [it off] my foot – I couldn’t do it. I was panicking, I was hurting, it took a very long time.”

The victim begged his attacker for help, but was left trapped as they ran back to their van to make a getaway.

Mr Yosifidis eventually freed himself, but an X-ray later that afternoon revealed he was left with a leg broken in two places.

Police are still on the lookout for the three thieves.

If you have any information regarding the incident, contact Crime Stoppers on 1800 333 000.