Two freight trains have collided in southern Pakistan but no casulaties have been reported.
The crash happened on the main line to Peshawar
A train carrying chemicals hit an oil transporter near the town of Kotri, 110 miles (180km) north of Karachi.
The collision started a fire which destroyed several wagons but nobody is believed to have been hurt.
A railways official in Hyderabad said it was too early to tell why the crash happened but they are looking at all possibilities including sabotage.
"The train carrying oil was on the track at the station when a northbound goods train hit it from behind and a fire broke out," The interior minister of Sindh province, Rauf Siddiqui, told the AFP news agency.
The incident has led to train services between Karachi and Peshawar being suspended.
It is the latest in a series of recent accidents on Pakistan's railways.
On Saturday one person died and and 30 were injured when a passenger train was derailed at Bahawalpur in Punjab province.
Last month four people were killed when an express train derailed and plunged into a ravine near Jhelum, also in the Punjab.
In both crashes sabotage has been suspected.