U.K. warns of bioattack threat for 2010 Olympics

U.K. government security chiefs recently warned that an attack with chemical or biological weapons on the British public transport system remains a major threat to the London Olympics in 2012.

Concerns were raised by reports that nearly 100 Islamic extremists currently serving jail time will be released in time for the games to begin next July. Among those set to be freed are several convicted of bomb plots and conspiracy to murder, according to TheSun.co.uk.

“We know some of them are still committed extremists likely to return to their terrorist activities,” Jonathon Evans, head of MI5, the British intelligence service, said, TheSun.co.uk reports.

Two of the early releases include members of an Al-Qaeda-related group. Omar Abdur Rehman and Qaisar Shaffi were sent to prison for plotting to detonate a radioactive bomb. Their cell had also developed plots to bomb the Thames River in order to flood the London metro system and to destroy famous British landmarks, according to Mirror.co.uk.

Rehman and Shaffi will be freed after having served only half of their 15 year sentences as part of a government early-release program. The conditions of their release include a 9 p.m. curfew and the full disclosure of any personal relationships they develop. The pair will also be under 24 hour surveillance, which could cost taxpayers 10 times the amount of keeping them in prison.