An incident room has been set up at Sunderland police headquarters, in Gill Bridge Avenue, and detectives want to speak to witnesses to two early-morning incidents in the city.
Officers say there was a disturbance in Enid Street, Fulwell, between 1.30am and 3.30am, involving several people, and another incident half a mile away in Brandling Street, between 3.30am and 7.30am.
Witnesses should contact 0191-454 7555, extension 66082.
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