At least 40 people have been killed and 30 wounded in a suicide attack at a Shia cultural and religious organisation in a western area of the Afghan capital, Kabul.
The interior ministry told the BBC the suicide blast was followed by another two explosions in the area.
No-one has yet said they were behind the attack.
In recent months, so-called Islamic State has been carrying out attacks on Shia targets across the country.
The Taliban denied responsibility for the attack in a statement to the media released by the group’s spokesman, Zabiullah Mojahid.
The explosion occurred in a basement meeting room of the Dashte Darchi cultural center in west Kabul, according to journalist Ehsanullah Amiri, who was at the scene.
A crowd of fewer than 100 people were meeting to commemorate the Soviet invasion of Afghanistan, Amiri said. The bomber infiltrated the crowd before detonating a device. The two other devices, described by Amiri as IEDs, were also in the building and went off shortly after the first explosion.
Ambulances and police vehicles ferried the dead and wounded to nearby pubic and private hospitals, he told CNN. Security forces cordoned off the site and blocked the main road approaching the scene. Authorities also warned onlookers to stay away from the site of the explosion.
The building also housed a Shia mosque, locals told Amiri.