Lloydminster RCMP say the scene at Barr Crescent has been cleared, but officers have since moved to a second location near 32 Street and 47 Avenue.
Police advise that there will be a heavy presence in the area, though investigators believe there is no ongoing risk to the public.
Residents are asked to avoid the area and to refrain from posting photos of responding officers on social media until the operation concludes.
An update with additional details is expected.
