LONDON, March 9 (Xinhuanet) -- Five of the nine British detainees held as terror suspects at Guantanamo Bay in Cuba flew home Tuesday.

    Upon their arrival at RAF Northolt, a Royal Air Force Base northwest of London, four of them were arrested by anti-terror police and the fifth man was detained under port and border controls.

    Four other Britons remain in custody in Camp Delta, which is part of the US military base in Cuba. They are likely to face trial before a US military commission.

    The US authorities insist that the other four British suspects are too dangerous to be released, saying they would pose "a serious threat" to the United States and Britain if freed, local media reported.

    They have been held at Guantanamo Bay for more than two years since they were captured in Afghanistan or Pakistan.

    British Home Secretary David Blunkett, who is visiting the United States for talks over terrorism, announced the return of the five at Harvard law school on Monday.

    "They, when they return, will of course go through the normal process of being interviewed by the counter-terrorism branch in London and the material that has been provided will be evaluated,"said Blunkett.

    He said the five coming home -- Ruhal Ahmed, Asif Iqbal, Shafiq Rasul, Tarek Dergoul and Jamal al Harith -- were different cases from the other four who will remain -- Feroz Abbasi, Moazzam Begg, Martin Mubanga and Richard Belmar -- since the later were arrested"in the combat zone" in Afghanistan.

    Around 660 terror suspects in links with Taliban and al-Qaida are still being held at Guantanamo Bay.

    Up to March 1, 88 detainees of various nationalities have been released from Guantanamo Bay and 12 have been transferred to their home countries for continued detention. Enditem