Two brothers of a man convicted of involvement in the fertiliser bomb plot have absconded from a control order imposed on them under terrorism laws.

Scotland Yard said they are anxious to trace Lamine Adam, 26, and Ibrahim Adam, 20, and a third man, Cerie Bullivant, 24, who went missing this week. The Adams are the brothers of Anthony Garcia, 25, who was jailed for life last month after being convicted at the Old Bailey of conspiring to commit a terrorist attack in Britain.

Police said that the Adam brothers failed to contact a monitoring company on Monday evening. Bullivant failed to report to a local police station on Tuesday morning.

The Adam family live in Ilford, East London, and are of Algerian origin. Bullivant is also from East London.

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Lamine Adam was repeatedly mentioned as an associate of those convicted during the Operation Crevice terrorism trial, which exposed plots to blow up Bluewater, the Ministry of Sound and synagogues. A key witness alleged that Lamine Adam was planning a separate attack on a British target.

He worked for London Underground alongside a man, known during the trial as “Imran”, who was asked by terrorism leaders in Pakistan to launch a suicide attack on the Tube network. Imran also breached his control order. He has been on the run since escaping from a psychiatric unit in West London last August.

Police sources said last night that the three most recent absconders were unlikely to have passports under the terms of their control orders.

Three other men have also absconded from their control orders, with police fearing that one has fled abroad on a false passport.

The Home Office said: “The Home Secretary, on police operational advice, today approached the High Court requesting that anonymity be lifted in order to assist with their investigation.” She said that the Home Secretary would make a written statement to Parliament today.

In terms of being a threat the latest absconders are considered at the “lower end” of those individuals covered by control orders, and, as a result, are subject to less severe restrictions, according to Whitehall sources.

Peter Clarke, head of the Metropolitan Police Service Counter Terrorism Command, said: “We know that Lamine Adam, Ibrahim Adam and Cerie Bullivant are associates and may well be together. I am asking members of the public who actually see these men not to approach them, but to call 999 immediately.”

The orders on the three were imposed under the Prevention of Terrorism Act 2005. Lamine Adam is 6ft (1.82m) tall, with a slim build, light complexion and short dark brown hair. He was last seen with a short beard or stubble.

Ibrahim Adam is 6ft 2in, slim, and has a light complexion and short dark brown hair.

Cerie Bullivant is white, 5ft 7in, slim with brown receding hair and brown eyes. He is thought to now have short hair. Last night Lord Carlile of Berriew, QC, the Government’s terror watchdog, said: “The controls placed upon them were proportionate and the minimum that were needed to stop them leaving the country – it being suspected they wish to leave to join the insurgency.”

Anyone with information is asked to contact the confidential AntiTerrorist Hotline on 0800 789 321.

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