A man and woman were left with "significant injuries" following a fracas on a town's high street in the early hours of the morning.
Durham Constabulary has said the incident in Front Street, Chester-le-Street, happened near to the Wicket Gate bar.
A spokesman said: "It is reported that during the course of the incident a male was assaulted causing significant facial injuries and a female was assaulted causing significant head injuries.
"It is believed that the female was assaulted with a glass.
"Inquiries are ongoing and police are appealing to the public for further witnesses who were present and may be able to assist with the investigation.
"It is believed there were a large amount of people present who may have witnessed the incident."
The incident happened at 3:30am on Sunday, March 25.
Anyone with information is asked to contact Consett CID on 101, quoting incident reference DHM-05032018-0064.