A source said that the two men, both black, were known to each other. It is believed they were both from Slough. Other witnesses said there had been a confrontation between the two men and that one had tried to flee from the other. A local shopkeeper, who asked not to be named, said: 'One man was trying to run away from the other one. A black taxi was flagged down and both men jumped in. They were arguing and one of the men then pulled out a knife and did the stabbing. There was blood over the seat and on the pavement as the door was still open. The taxi driver, who I think was a Sikh and had been on his way home at the time, then panicked and took the men to the police station.'
Thames Valley Police confirmed that the death was being treated as murder. A spokesman said: ''The major crime team from Thames Valley Police is investigating the killing of a man who arrived at Slough Police Station in Windsor Road in a taxi. An ambulance was called but unfortunately he was declared dead before he reached hospital. An area at the police station has been sealed off for forensic examination, along with an area of Stoke Poges Lane."