Chief Superintendent Steve Neill says officers would like to hear from people who may have seen anything unusual in Stanley Street at any time in the last few days.
More top news
A look ahead at the weekend weather for the Tyne Tees region.
Exmoor ponies have proved to be such a success for the habitat at a South Tyneside nature reserve that they've been brought back.
A replacement bridge on one of Stockton Borough's busiest roads has opened well ahead of schedule.