OBAURO - Unknown persons opened firing at two Punjab bound buses in Obauro on Monday. According to police, unknown persons opened firing at two buses at it was heading towards Punjab. The assailants stormed the buses and thrashed the bus driver and the passengers after the buses came to a halt. No casualties were reported in the incident. The gunmen managed to flee the scene. The passengers blocked the National Highway as a sign of protest due to which the traffic system was severely affected.