New Delhi, Sept. 28 -- British counter-terrorism police were investigating a possible Iranian connection to a bomb scare at a US-used air base on Monday, after five men were detained on suspicion of planning a "terrorist act".

The investigation was launched after authorities received information shortly after midnight on Sunday about three "suspicious" white vans that appeared to be travelling towards near RAF Fairford in Gloucestershire, southwest England.

Police detained five men on suspicion of explosives-related offences before subsequently arresting them on suspicion of "preparing a terrorist act", according to AFP. The five suspects remained in custody on Monday as officers continued questioning them.

Authorities have not disclos...