TWFRS declared on social media that “a normal response to incidents has resumed and our major incident has now been stood down.”
The fire service said that it was only responding to incidents that constituted a risk to life or property during the significant incident.
Anyone with information that could help the police with their investigation is now being urged to come forward.
The public can reach Northumbria Police by calling 101 and mentioning reference number NP-20250502-1124, using the live chat or report form features on the force’s website, or sending a direct message on social media.
