A man has been arrested on suspicion of attempted murder for allegedly pushing a commuter under a train at a London Underground station.

The incident was said to have happened at Kentish Town station this morning in front of shocked commuters, including a group of school children.

The injured commuter, believed to be in his late teens or early 20s, remains in a serious condition in hospital. His injuries are not life threatening, but are potentially life changing.

A 29-year-old man from Colindale, in London, voluntarily visited a police station and is assisting officers with their inquiries.

A 29-year-old man from Colindale, in London, voluntarily visited a police station and is assisting officers with their inquiries

The commuter was left seriously injured after allegedly being pushed under a train at Kentish Town tube station. Pictured: Paramedics carry the injured man from the tube station on a stretcher

Detective Superintendent Gary Richardson, of BTP, said: 'I can confirm a 29-year-old man from Colindale, London, has been arrested on suspicion of attempted murder following an incident today at Kentish Town London Underground station.

'The man voluntarily attended a London Police station. He is currently in police custody helping officers with their enquiries.

'I would like to thank the public and the media for their help.'

A man was captured on CCTV fleeing from the scene at Kentish Town station after allegedly shoving the young man onto the tracks as a train approached.

Today, witnesses spoke of their shock at what they had seen.

Music manager Mel Westwood, 39, was on the southbound train from her home in Woodside Park, north London heading for a meeting in Camden.

The mother-of-two said: 'I was in the front carriage when I felt a bump. Then I saw everybody on the platform put their hands over their mouths. They looked shocked and distressed.

'I could see a group of five-to-six year-old schoolchildren on the platform crying with their teacher. I thought it was a kid that we hit.

'Then the driver came into the carriage. I said "Do you know who it was?"

'I felt the bump in the middle of the platform and then it kept going until the end.

'And I saw afterwards a policeman lying down in the middle of the platform.

'I didn't want to look but I spoke to another lady and she said the policeman was talking to him and they were having a dialogue.'

The man, thought to be in his late teens or early 20s, remains in a serious condition in hospital

Police are now investigating after witnesses said the man was deliberately shoved onto the tracks during this morning's incident. Ambulances are pictured outside the scene at Kentish Town tube station

The incident took place at around 11.45am and caused delays to the Northern Line. The line is now running a normal service but the station remains closed.

One witness told how she thought there was a bomb as police ran through the streets shouting 'move, move'.

Florist Natasha Boon, whose stall is next to the station, said: 'It was very traumatic. People have been really upset what a thing to happen - it's an awful thing. I have heard that those who were there are in a real state.'

Kentish Town station was evacuated after a man, thought to be in his late teens or early 20s, was 'deliberately pushed' under a moving train

Sally Keable, who works at the fruit and vegetable stall next to the underground station, also feared it was a terrorist attack.

The 60-year-old said: 'There were lots of police first of all so I thought it was a bomb.'

Several witnesses took to Twitter to describe what had happened, including the 'panic' in the driver's voice as he announced what had happened.

One user on the site said there had five police vans, fire engines and ambulances outside Kentish Town station.