KABUL - At least 64 commuters have been killed and three others sustained injuries in a deadly road mishap in western Afghanistan's Herat province on Tuesday night, head of the rescue department in the province, Abdul Zahir Noorzai, said Wednesday.

The accident took place after a passenger bus collided with a motorbike and a mini-truck on a road linking the neighboring Iran to Herat city in Afghanistan, the official added.

The majority of the victims, including women and children, were Afghan refugees who returned from Iran to settle in their homeland, Afghanistan, according to the official.

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In the meantime, another official, on the condition of anonymity, said that the passenger bus caught fire and many bodies could not be recognized.

The number of the victims, according to the official, could go up as the collection of information continues.