Ten people have been killed in a bus accident at one of Tehran's largest universities, Iran's conservative news agency Tasnim reported Wednesday. The bus was carrying 30 students along a mountainous road within the science research campus of Islamic Azad University in northwestern Tehran when it came off the road and hit a concrete column on Tuesday.

Seven were killed instantly, state TV said, while an updated death toll of 10 was reported by Tasnim the day after the crash. Iran was the world's seventh deadliest country for drivers per capita, according to the World Health Organization's latest figures from 2013, and the only non-African country apart from Thailand in the top 10. Iranian authorities say over 16,000 died on the road in the last Iranian year (2017-18). Efforts to modernise Iran's ageing and highly polluting cars have been hampered by a lack of investment, and foreign companies such as Peugeot and Renault were again forced to withdraw this year by the return of US sanctions.