A 27-year-old man is being held on suspicion of terror offences after "suspicious items" were allegedly found at his home in Naseby Road, in the Alum Rock area of Birmingham.
Houses on the street were temporarily evacuated, as police, the fire service and army checked items in his house for safety.
West Midlands Police arrested the man in a counter-terror swoop.
He was arrested in the early hours of Sunday morning, on suspicion of possessing an offensive weapon.
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No further information on the nature of these items has been disclosed, but police said he was being held under Section 41 of the Terrorism Act, which relates to those concerned in the commission, preparation or instigation of acts of terrorism.
Detectives have until Tuesday to question him.
