Kormos says the gunman fled to school after the shootings and there is no information yet on the motive for the attack. A reward of 5 million forints ($25,300, euro18,600) has been offered for information leading to the capture of the assailant.
The two male victims were shot in the head.
Csepel is located on the northern tip of a large island in the Danube River and during the communist regime it was the hub of Budapest's heavy industry.
