Five Bangladeshi men arrested after taking photos near the Sellafield nuclear plant have been released without charge.
The men, all in their 20s and from London, were held on Monday afternoon after a police stop check on their vehicle outside the high security nuclear facility in west Cumbria.
It is thought they were taking photos or filming in the area, sparking suspicions from the police.
They were held in custody for two nights and questioned by counter terrorism detectives.
Police officers also raided four addresses in east London as part of the investigation.
But a spokesman for the North West Counter Terrorism Unit, part of Greater Manchester Police (GMP), has said all five are free to go.
The spokesman said: "Five men arrested under section 41 of the Terrorism Act have today, Wednesday May 4 2011, been released without charge.
"At about 4.30pm on Monday May 2 2011, police officers from the Civil Nuclear Constabulary (CNC) conducted a stop check on a vehicle close to the Sellafield site in West Cumbria.
"As a result, police officers from Cumbria Constabulary made five arrests. The investigation was led by the North West Counter Terrorism Unit, supported by the CNC and Cumbria Constabulary.
"Officers have conducted a thorough investigation and a decision has been made to release the five men without charge."
