Four people have been killed and 40 injured in a South Africa train crash, according to medical services.
The crash took place on the main line between Tehran and Iran's second city Mashhad.
Here is a list of the five deadliest rail disasters worldwide in the past two decades
The annual event attracted a standard 20,000 participants and passed without any major incidents
Two Ugandan pastors are among the 80 people that died in the train crash on Friday in Cameroon
Their bodies are still in Cameroon and families have appealing to the government to help repatriate the bodies
Prime Minister Matteo Renzi says the country will "not stop until we know what happened".
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