An oil tanker carrying 40,000 liters of fuel on Saturday toppled on the National Highway in Rahim Yar Khan, and two persons including its driver sustained injuries in the incident. According to details, the tanker turned turtle when the driver dozed off and could not control the vehicle in Rahim Yar Khan's area Zahir Pir. Motorway police and other rescue teams reached the spot upon hearing the news, and highway was closed for traffic which resulted in long queues of cars.