Forty-one people, including military personnel, were killed in a suicide attack targeting an Iranian Islamic Revolutionary Guards Corp (IRGC) bus, Trend reported citing Sputnik.
Earlier in the day, the local news agency IRNA reported citing its source that 20 people were killed.
The deadly attack took place in the Chanali area of the Khash-Zahedan road, between the cities of Zahedan and Khash — an area not far from the border with Pakistan, where drug smuggling and military activities are quite frequent.
According to the IRNA's source, the death toll currently stands at 20, while some 20 more have been injured as a result of the attack.
At present, no terrorist group has taken responsibility for the attack.