A man has been arrested after counter-terrorism officers raided three homes in Bradford.
An Army bomb disposal unit was called in for support after the “discovery of some items” at one of the properties, police said.
A number of neighbouring houses in Sutton Avenue were evacuated as officers carried out a search.
Police said a 38-year-old man had been arrested on suspicion of explosives offences.
Counter Terrorism Policing North East said a police cordon was lifted at 15:30 GMT and residents have returned to their homes.