Police hunting 11 detainees who escaped from an immigration centre have released pictures of four of them.
All of the escapees have served a custodial sentence
Twenty-six men fled Oxford's Campsfield House in Kidlington after a fire began on Saturday, but 15 were recaptured.
Three of the four men whose pictures were released were convicted for drugs offences, the fourth, for robbery.
They are: Jamaicans O'Neil Anthony Wilson, 29, and Heardley Leon Benjamin, 38, Ali Sabir Jabar, 28, from Iraq and Cuong Hung Doan, 26, from Vietnam.
Thames Valley Police also revealed a 29-year-old man has now been arrested on suspicion of arson with intent in connection with a blaze at the centre.
A spokesman for Thames Valley Police said: "The [four] men are believed to have links with Bristol, Leicester, Lewisham and Birmingham."
Wilson served five years and Benjamin served four for drugs offences, Doan was imprisoned for three years for cultivation of cannabis and Jabar served three years and nine months for robbery offences.
Earlier on Wednesday, the force revealed it was concentrating its search in London and the West Midlands.
More than 50 officers are involved in trying to find the remaining escapees - who are all convicted criminals.
A demonstration was held on Tuesday in support of detainees at the centre.
Assistant Chief Constable Francis Habgood, from Thames Valley Police, said: "Police officers across the country are working hard to try and recapture those who escaped.
"All of those escaped had served a custodial sentence for a range of offences and were being considered for deportation."
Of the 26 who escaped, 12 were caught very soon after the break out and three were found on Tuesday.
All those caught are now being held under the Immigration Act.
Campsfield is run by the American company GEO and holds up to 200 male inmates at a time.
It has been surrounded by controversy since it opened in 1993.
It has been the scene of escapes, a rooftop protest, hunger strikes and a well-organised campaign to have it shut down.
Campaign to Close Campsfield have held regular protests outside the centre to highlight what it sees as the unfair treatment of the detainees.