Pools of blood stained a kebab shop floor on Saturday after two men were stabbed by a gang of thugs armed with broken bottles and belts.
The men were involved in an argument before being attacked inside Kebab Express in Northolt Road, South Harrow, at 1.45am by around 15 men carrying broken bottles and belts.
The two victims were stabbed in the face and neck and were taken to Northwick Park Hospital in Watford Road, Harrow. It was believed their injuries were life threatening but both were discharged on Sunday after undergoing surgery.
Kanagaratnam Sujeevan, 32, has owned Kebab Express for two years and witnessed the brutal attack. He said: "There had been an argument out-side and the two men came in to the shop and sat down. Suddenly a group of around 15 men came inside holding bottles and belts in their hands.
"Me and a member of staff went to call the police but we were very scared. A fight started in the shop and the two men were bleeding from their heads and neck. There was a lot of blood everywhere."
If caught it is expected the attackers will be charged with Actual Bodily Harm.
Ross Simpson, chairman of Harrow Crime Prevention Panel, is shocked by the attack. He said: "This is more devastating news about violent crime happening in the borough. In spite of police officers' best efforts violent crime is still taking place. Parents of these people, whatever their age, also need to take responsibility for their actions."
Detective Constable Laura Curry from Harrow CID is appealing for witnesses to come forward. She said: "This was a brutal attack in which two young men have sustained very serious injuries.
"One of the attackers is described as a 19-year-old man of Somali origin who is 5ft 9in tall, with defined cheekbones, wearing a green army cap and baggy jeans.
"We believe he was one of a large group of males who assaulted these two men in Kebab Express."
Anyone with information should call Harrow CID on 020 8733 3485 or call Crimestoppers anonymously on 0800 555 111.