ISIS claimed responsibility on Tuesday for the Easter Sunday suicide bomb attacks in Sri Lanka, as an official in the country said the preliminary investigation into the attacks shows it was “retaliation” for the massacre of Muslims at mosques in Christchurch, New Zealand. The coordinated bombings on Sunday, targeting churches and hotels in and around the Sri Lankan capital, killed more than 320 people.

“The preliminary investigations have revealed that what happened in Sri Lanka was in retaliation for the attack against Muslims in Christchurch,” state minister of defence Ruwan Wijewardene told parliament. No other Sri Lankan officials repeated the assessment of the intelligence, and it was unclear what Wijewardene based his judgement on.