LONDON - Police said on Thursday they had evacuated an area of the central English city of Birmingham after finding a “suspicious substance,” and that army bomb disposal squads had been sent in. “Police have this morning evacuated properties in the Long Nuke Road area,” a spokesman for West Midlands Police was quoted as saying by Britain’s domestic Press Association news agency.Police said a 100-metre (-yard) cordon, described as a precautionary measure, had been placed around the site of the discovery. “This follows the execution of a warrant at a property in Long Nuke Road, where a suspicious substance was recovered. It is not known at this stage what the substance is,” the spokesman said. The Press Association added later that army bomb disposal experts had been called to the scene by police. Police declined to confirm why the premises was searched, but the warrant was not executed under the Terrorism Act.