text: They said: “Whilst police visited a neighbouring house in Arthur Street a range of materials which could be hazardous were found and police are working with the occupant to understand what the materials are.
  “As a precautionary measure the EOD are assisting us to establish whether they are potentially harmful.
  “Police are not treating this as a terrorist incident and are continuing to work with the householder and the EOD to bring this matter to a close safely. At this time, it is not believed that any further evacuation will be required but the police will naturally need to keep this under review.”
  However, they later confirmed the ‘material’ found inside a house was not illegal. They said the “EOD are satisfied the material was not a danger to the public and no arrests have been made.”
  As police negotiated with a man barricaded inside a house, side streets including Fleming and Arundel Street, plus back alleys between Arthur Street and Henry Street and Newcomen Terrace, were all cordoned off by police.
  The scene was close to the tourist area of the town and passers-by watched on on what was the hottest day of the year so far.
  Cleveland Police confirmed that officers arrived on scene to deal with a man who had barricaded himself in a house at around 10.50pm.
  They then began door-to-door inquiries where they made a discovery which required assistance from the bomb squad.
  At around 11am this morning, neighbours on the street said the cordon had been in place all night and officers were still dealing with the incidents.