Four people have been arrested following a violent assault that left two Melbourne police officers injured.

Police were called to St Kilda early on Sunday morning following reports of an alleged assault.

When they arrived, two officers were set upon by a group.

Confronting vision shows the sickening attack, with one officer having his head repeatedly slammed against the road.

WARNING: This vision is extremely confronting and may contain explicit language

EXCLUSIVE: We speak to the witness who filmed this disgusting attack on two Snr Constable police officers at St Kilda. He was fearful the officer being smacked into the ground was going to die. I’ll be live at 6 with an update on their injuries #7newsmelb pic.twitter.com/Sd9AmjeJz8

— Teegan Dolling (@tdolling) February 24, 2019

Both officers were hospitalised, with one undergoing surgery and the other still being monitored.

A 26-year-old St Kilda man, a 27-year-old Langwarrin man, a 25-year-old Langwarrin woman and a 38-year-old Frankston man have been arrested.

They’ve all been charged with two counts of assault police, affray, violent disorder, intentionally cause injury and other assault-related offences.

Three other offenders remain on the run, with police vowing to find and arrest them.

Victorian Police Union secretary Wayne Gatt has told Macquarie Radio it’s the most “disgusting” attack seen in recent times.

Ben Fordham questions, “What the hell is going on in Victoria?!”

“You wonder whether the Victorian government has acknowledged, yet, that they may have a law and order problem”.

Click PLAY below to hear Ben’s full comments