At least 40 people, many of them students, have been killed and 30 wounded in two suicide bomb attacks in the Afghanistan capital, Kabul.
Both a Shia muslim cultural centre and the Afghan Voice news agency were targeted. ISIS have claimed responsibility for the attack.
The interior ministry told the BBC an explosion at the Shia centre was followed by at least two more blasts.
ISIS has been behind a number of attacks on Shia targets across the country in recent months.
The main blast went off inside the Tabayan cultural centre, but offices of Afghan Voice were also at the location of the attack.
Many of the victims were students, who had gathered at the Shia centre for a discussion forum.
The interior ministry said the event was to mark the 38th anniversary of the Soviet invasion of Afghanistan.
The initial explosion was followed by at least two others, although the ministry said these did not cause any fatalities. Images on social media showed a number of bodies in a courtyard following the blast.
The deputy health minister, Feda Mohammad Paikan, said 35 bodies had been brought to the nearby Istiqlal hospital. Television pictures showed many of the injured suffered serious burns.
President Ashraf Ghani’s spokesman issued a statement calling the attack an “unpardonable” crime against humanity and pledging to destroy terrorist groups.
The incident follows an attack on a private television station — Shamshad TV — in Kabul last month. ISIS gunmen stormed the broadcaster dressed as policemen, killing at least one person and leaving two dozen wounded.
Contrary to rightwing narratives, innocent Muslims comprise the majority of victims of terrorism around the world.