British counter-terrorism police are investigating bomb threats made last weekend against the US Air Force base at RAF Fairford, suspecting a potential link to Iran. Police have arrested five men. The base previously served as a command post for US military strikes against Iranian missile sites.

Background: Iran's Revolutionary Guard has warned that any base used for airstrikes against Iran would be considered a legitimate target. US President Donald Trump stated on Sunday that he expects more talks with Iran this week, after he rejected Iran's proposal to reopen the Strait of Hormuz.