Commuters have told of the horrifying moment a toddler was injured after she fell through the gap between a London Underground Tube train and the platform at one of the city 's busiest stations . The three-year-old girl had been standing with on platform 2 at Baker Street station with her nanny and another child when she fell between the platform and a Metropolitan line train . It is thought they were trying to board a northbound service when the doors opened when her carer 's back was turned . The three-year-old girl had been standing on the platform at Baker Street station , pictured , when she fell between the platform and a Metropolitan line train . The incident happened at 4pm yesterday and passengers quickly hoisted the girl to safety before she was subsequently checked over and assisted by station staff . Luckily , she only suffered a bruise to her forehead after she hit the metal foot plate of the train . She was taken to hospital for a check-up and was said to be in good spirits . A witness who saw the incident unfold told the Evening Standard : 'The little girl was waiting with an adult and another smaller child and was getting ready to board the train . 'There ’ s a gap on the platform where the track bends around and she fell into that gap . Some gaps are big enough for me to fit in . ' Transport for London confirmed that the incident had taken place and said that an investigation had been launched into how the young girl fell . Steve White , operations director of London Underground said : ' A young girl fell between a train and the platform at Baker Street station . 'An investigation is underway but it seems that while her carer 's back was turned , the girl stepped into the gap between the platform and train . 'The train was stationary throughout and the girl was pulled out straight away . Our staff made sure that she was taken to hospital as a precaution . ' Baker Street underground station is the oldest in central London and has pronounced curve in the track , creating a large gap when a train pulls into the platform . Baker Street underground station is the oldest in central London and has pronounced curve in the track creating a large gap in the platform . Mick Cash , leader of the Rail , Maritime and Transport Union , said : 'This is a shocking incident and RMT is awaiting the outcome of the investigations by the Office for Rail Regulation . 'However , once again , RMT warned that there were dangerous gaps between platforms and the trains with this rolling stock . 'This incident again exposes the lethal nonsense of cutting station staff on the underground network . ' It is the second such accident on a Tube platform in a week after a woman was injured at Clapham South station in south London after her coat got trapped in a door . Witnesses told of fire crews hoisting up a Tube train to free the woman on the northbound platform of the Northern line , and claimed the woman was pulled underneath the train as it approached a 'crowded ' platform . However , Transport for London denied that overcrowding was the cause of the incident .
Toddler was waiting on the platform for a train at Metropolitan station . She fell between the platform and a northbound Metropolitan line service . Happened when the train doors opened and her nanny was looking away . Commuters have told of their horror of seeing the girl fall through the gap . She was quickly hoisted to safety and only suffered a bruised forehead . Transport for London have launched an investigation into the incident .