Police said they raided eight homes in and around Copenhagen early on Tuesday searching for new leads over February shootings at a free speech event and a synagogue that killed two people.
Officers killed the gunman, Omar El-Hussein, in a shootout and have arrested three people in connection with the case. But the force has said it is still trying to piece together the sequence of events between the two attacks.
"We are still shedding light on the perpetrator's and accomplices' whereabouts, and this morning's raids should be seen in that light," Copenhagen police
said in a statement.
"We're searching for additional leads in the case and cannot comment further because of the ongoing investigation," it added.
The attacks shocked Denmark
, which prides itself on being a safe and open society.