Detective Inspector Paul Woods, from Northumbria Police said:
"At this stage there is no information to suggest any danger to the public. However, we recognise the theft could cause concern and I'd like to reassure people in the area we are doing everything possible to trace the firearms and the people involved.
"I'd urge anyone with information to contact police as soon as possible. There is an extra police presence in the area."
Any witnesses to the theft or anyone with information is asked to contact Northumbria Police on 101.
More top news
The singer's solo tour kicks off in Edinburgh in April and will see him play venues across the UK and Ireland.
The prisons watchdog has flagged up high levels of violence and severe drug problems at a large men's training jail.
As the Queen and the Duke of Edinburgh celebrate 70 years together today, a Gateshead couple are also in their platinum anniversary year.