A police operation was underway at the address for several hours on Friday, reports TTELA.
Police confirmed to the newspaper that they were at the same address on Friday morning.
"It is a case that is classified as a serious violation of the Weapons Act," says police spokesperson Göran Carlbom.
According to Carlbom, a possible connection between the events is now being investigated.
During the night, there was also an explosion in Uddevalla.
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