Two suicide bombers have blown themselves up at a mosque run by Yemen’s Houthi group in the capital Sanaa on Thursday, the first day of the Muslim Eid al-Adha holiday, causing many casualties, witnesses said.

At least 10 people were killed in the attack, targeting al-Balili mosque in the al-Safya district, said the Houthis Ansarullah group’s website.

The bombing came as Muslims around the world celebrated the Eid al-Adha – the feast of sacrifice – which Muslims mark by prayers in congregation at mosques.

No group immediately claimed responsibility for the attack.