He was discovered with stab wounds and was pronounced dead at

Murder squad detectives are today hunting a Burka-clad woman who is believed to have had a knife in her bag after a teenager was stabbed to death outside a university.

The terrified woman, who had a cut to her hand, ran into a nearby Costa coffee shop screaming for help after the man was attacked with a screwdriver and knife.

A coffee shop worker today claimed she saw a knife in the woman's bag following the tragic incident outside the University of the Arts in Acton, west London.

The victim, an 18-year old man, was attacked in the street outside a hall of residence just yards from the Costa coffee in Victoria Road on Thursday night.

The Metropolitan Police was called to reports of a fight outside the student halls in Acton, west London (pictured), at around 6.30pm on Thursday

Police today attended the scene outside the university after a man in his 20s was stabbed

Today detectives appealed for the woman to come forward.

The Costa worker, who did not want to be named, claims to have seen a knife in the woman's bag before she left the coffee shop and got in a car.

She said: 'She ran into the kitchen and she was shaken up and asking for help.

'I took her into the seating area and I saw something sharp in her bag, I'm sure it was a knife. She also had a cut on her right hand.

'She then went into the toilet for a while before coming out and getting into a car. I think she was a Muslim because she was wearing a burka.'

Following the attack at 6.30pm last night students who live in The Costume Store halls were warned to be 'careful and vigilant'.

A post-mortem is due to take place this afternoon and police say the victim's next of kin have still not been informed.

An eyewitness told how she saw the victim lay covered 'head to toe in blood' after a thug wielding a screwdriver and a knife stabbed him in the face.

The victim, who had a beard, was also knifed in the stomach in the attack outside the student halls.

The Metropolitan Police was called to reports of a fight in Victoria Road and the victim was pronounced dead at a nearby hospital.

A witness, who did not want to be named, said the boy had two stab wounds in the stomach and another in the face and was covered 'head to toe in blood'.

The 38-year-old local worker who was on her way home said: 'He had two stab wounds in his stomach and one in his face. He was covered head to toe in blood.

A shocked eyewitness has told how a murder victim lay covered 'head to toe in blood' after a thug wielding a screwdriver and a knife stabbed him in the face outside the halls of residence

A young man was found with stab wounds outside The Costume Store dormitory in Victoria Road (pictured) and taken by ambulance to a west London hospital, where he died

'There was a girl saying she saw a kitchen knife and there was a screwdriver covered in blood lying next to the body. It looked like it was intended, it was over so quickly.

'Two men were resuscitating him for about 20 minutes and they couldn't give him mouth to mouth because of his face injuries.

'He had dark hair and looked really young. He was casually dressed. There was so much blood, we were stunned the injuries were horrific.

'I could see a screwdriver covered in blood. The guys who were there just before me also saw a kitchen knife.'

Detective Chief Inspector Sam Price, Homicide and Major Crime Command, said: 'I am appealing for anyone who witnessed this attack to come forward and speak to police.

'I am particularly to keen to trace and speak to a female who was seen with the victim in the moments before he was attacked.

'There were a lot of people in the area of Victoria Road at the time of the incident and I would urge anyone who can assist our investigation to contact us.'