Police are searching the home of one of the people being held, Dr Mohammed Asha, in Bradwell, Newcastle-under-Lyme, two miles from Chesterton.
This picture of one of the searches in Staffordshire was sent in by Helen Thomas.
Police are scouring the scene at Glasgow airport, where a blazing jeep crashed into one of the entrances. The airport was otherwise back to 'business as usual', a spokesman said.
Armed officers are patrolling Glasgow airport as part of an increased presence across the UK.
Police officers are patrolling Waterloo Station in London, as extra patrols are introduced to reassure the public.
Armed police stand guard at the entrance to Terminal 4 at Heathrow Airport, which is described as 'busy but moving'.
London's Oxford Street has seen extra officers as part of the heightened security across the UK.