KARLSKRONA, Sweden, Feb. 24 (UPI) --A Swedish student had a memorable 21st birthday after police mistook balloons shaped like a "21" for the initials of extremist group Islamic State.

A 21-year-old Swedish woman will never forget her landmark birthday after police who thought she was promoting IS propaganda from her apartment window.

A concerned Swedish citizen called the cops when they spotted what they thought were a pair of mylar IS balloons floating in a window [via Al Jazeera. But it turns out the balloons didn't stand ...

The balloons that Sarah Ericsson had up in her window. Photo: Private After Sarah Ericsson hung up balloons in the shape of the number '21' for her birthday, her home was paid a visit by Swedish ...

Swede's 21st birthday balloons mistaken for IS ... A Swedish woman was told to remove birthday balloons from her window after police were called by a member of the public who thought they were ...