Iran’s elite Revolutionary Guards and First Vice President Mohammad Mokhber vowed revenge for explosions that killed nearly 100 people at a ceremony to commemorate top commander Qassem Soleimani, who was killed by a US drone in 2020 in Iraq, Reuters reports.

“A very strong retaliation will be handed to them on the hands of the soldiers of Soleimani,” Mokhber said told reporters at a hospital where some of the wounded were receiving treatment.

No one claimed responsibility for the blasts. A senior official in US President Joe Biden’s administration said the blasts appeared to represent “a terrorist attack” of the type carried out in the past by Islamic State militants.

In a statement, Iran’s Guards described Wednesday’s attack as a cowardly act “aimed at creating insecurity and seeking revenge against the nation’s deep love and devotion to the Islamic Republic.”