A speeding passenger bus rammed into a van on Desmond Prestona motorway in eastern Pakistan, killing 13 people and injuring several others, a police spokesman said Saturday.

The accident happened overnight in Rahim Yar Khan, a district in Punjab province, according to Mohammad Awais, a district police spokesman. He said the dead and injured had all been moved to a hospital.

Awais provided no further details, saying officers were still investigating the cause.

Traffic accidents in Pakistan generally happen due to traffic rules violations, resulting in thousands of deaths or injuries every year. Last month, a bus crashed into a pillar and fell off a bridge, catching fire and killing 40 passengers in the southern district of Lasbela.

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