ZAGREB - An explosive device was thrown on the Slavenskog Street here early Tuesday morning, damaging two cafes, the Zagreb Police Department said in a statement.

The unidentified perpetrator threw an explosive device at around 2:50 am local time (0050 GMT), shattering the windows and damaging the inventory of both buildings, according to the statement.

No deaths or injuries were reported, as the buildings were unoccupied at the time of the explosion.

An investigation is underway as police and forensic experts are on site and the street is closed to traffic, the statement added.