Police say they are seriously concerned after several children were spotted swimming in the River Wear just a short distance from where two teenagers drowned.
Chloe Fowler and Tonibeth Purvis died almost two weeks ago.
Today, police issued another warning, urging people to stay away from open waters.
It comes as new figures reveal a surge in calls to emergency services for people in trouble in the water.
More top news
Shrek The Musical is to make a return to the Sunderland Empire theatre as part of a new nationwide tour.
The North East is braced for Storm Doris which is expected to hit on Thursday
Winners will be announced on 27 April in London at a ceremony paying tribute to the students who have demonstrated the academic achievement.