Vandals caused £10,000 worth of damage to windows at a business premises in Amble last week.
Between 6pm on Thursday, May 29, and 7pm on Friday, May 30, seven windows of the Northern Structures building on the Amble Industrial Estate were damaged.
The windows had been shot at by a pellet gun.
Inquiries are ongoing and anyone with any information into the incident is asked to contact police on 101 ext 69191 quoting reference number 029323V/14.
A window was also smashed at a business premises on Greenwell Road, Alnwick.
Between 6pm on Friday, May 30, and 7:45am on Saturday, May 31, vandals threw stones at one of the building.
Anyone with any information into the incident is asked to contact police quoting reference number 029359X/14.