The hunt for a man who allegedly poured hot coffee on an Australian baby has turned international, after police discovered he fled on Aug. 31.

The Aug. 27 attack left the baby with severe burns on his chin, neck, chest and back from the scalding hot coffee. The man’s motive has yet to be identified.

The baby, known only as Luka, was sitting with his mother in a Brisbane park on a picnic rug. Another mother and her baby were with them, reports the Australian Broadcasting Corporation (ABC).