
This is the horrific moment a teenage girl writhes in agony after a noxious substance was squirted at her on a London bus.

The girl, 18, collapses on the floor of food market stall in a shopping arcade desperately trying to rinse her mouth out with bottled water as shocked witnesses look on.

Mohammed Raffiq told MailOnline how the teenage girl stumbled into his stall and screamed, 'Help me, I'm burning' as she slumped to the floor by the chiller cabinet and tried to cool herself down.

She stumbled in to Mr Raffiq's stall in the Reliance Arcade moments after she was sprayed in the face with a on a bus in Brixton, south London.

She is said to have been deliberately targeted by a female attacker, police believe. Firemen were pictured hosing her down behind a screen on the street before she was taken to hospital.

This is the horrific moment a teenage girl writhes in agony after a noxious substance was squirted into her mouth on a London bus yesterday afternoon

The girl, 18, is filmed slumped on the floor of food market stall in a shopping arcade desperately trying to clean her mouth out with water as shocked witnesses look on

Witness Mohammed Raffiq (pictured right) told MailOnline how the teenage girl screamed, 'Help me, I'm burning' as she fell to the floor and tried to cool herself down

The teenager (pictured) stumbled up to shopkeeper Mohammed Raffiq's stall (pictured) in the Reliance Arcade after she was squirted in the face with a corrosive liquid on a bus in Brixton

Mr Raffiq is seen on the CCTV video trying to help her as another bystander calls an ambulance.

He said: 'She was screaming and clearly in a lot of pain. She grabbed a bottle of water from the fridge and was squirting it into her mouth and on to her face.

'She said, 'Someone gave me acid! Someone put it in my mouth! It's in my mouth!'

He went on: 'I gave her five more bottles of water and she went into another shop to wash herself down.'

Police said last night they were hunting a lone female suspect. The attack is being treated as grievous bodily harm and is believed to be targeted and not random, they added

Footage online showed the woman sitting on the pavement as firemen hosed her down shortly before 2pm before surrounding her with a sheet while she was treated by paramedics

Meanwhile the victim's sister told the Evening Standard: 'This is an issue. It's getting worse. I think she's ok. But how is this all going to stop?'

The young woman, who is believed to have been involved in a fight on a bus, was taken into a woman's hairdressers shop.

Hairdresser Sabrina Belachew told MailOnline: 'The poor young woman came into my shop. She was in terrible pain 'She was screaming: 'I'm burning, I'm burning.'

'She was asking for scissors to cut her hair.

'She said her attacker had sprayed something in her mouth and put something in her hair.

'I felt very sorry for her and worried for my own children. Everyone has to use the bus.'

Mohammed Raffiq (pictured) was on the video trying to help her as another bystander called an ambulance. He said: 'She was screaming and clearly in a lot of pain. She grabbed a bottle of water from the fridge and was squirting it into her mouth'

The alleged attacker is on the run and is believed to have deliberately targeted the victim, spraying part of the substance in her mouth

The woman wearing a white top and dark trousers is filmed collapsed on the floor while passers by discuss how best to help her

Footage online showed the woman sitting on the pavement as firemen hosed her down shortly before 2pm before surrounding her with a sheet while she was treated by paramedics.

Police said last night they were hunting a lone female suspect. The attack is being treated as grievous bodily harm and is believed to be targeted and not random, they added.

A Scotland Yard spokesperson said: 'The woman was treated at the scene as she got off the bus. She was then taken to a central London hospital for treatment.

'Her condition is not life changing or life threatening. She has no major burns.

'Enquiries continue to trace the single suspect involved, who is now believed to be female.

The spokesman added: 'This incident appears to be targeted and not a random attack. The bus - which is believed to be the scene of the attack - continues to be examined.'

The attack follows a violent Bank Holiday weekend in the capital with a series of acid attacks, stabbings and shootings.

Several teenagers were stabbed in separate incidents yesterday.

The 'acid attack' is the latest violent incident to hit London in the past few days with a number of attacks including an incident in Woolwich during rush hour yesterday when a man in his late teens was also stabbed in the leg

One victim, aged 16, suffered multiple stab wounds following what was reported as a 'large fight' in Hackney.

An 18-year-old man was also taken to hospital with a serious leg injury after police were called to the Nightingale Estate at about 4.10pm.

Scotland Yard said the younger boy was given treatment at a local surgery before being taken to a central London hospital. His condition was not believed to be life-threatening or life-changing. No arrests have been made.

Another victim, in his late teens, was stabbed in the leg during an evening rush-hour incident near Woolwich Arsenal station, south-east London.

Police had again received reports of a fight, and a man was later arrested on suspicion of possessing an offensive weapon. The extent of the victim's injuries is not known.

Meanwhile, a man in his 50s died after he was found unconscious in a street in Barking, east London, at 6am this morning. His death is being treated as unexplained, Scotland Yard said.