Muslims worldwide are celebrating Eid al-Adha, or the Feast of the Sacrifice, which commemorates the biblical story of Abraham and his readiness to sacrifice his son as an act of obedience to God, by the sacrificial killing of sheep, goats, cows or camels | Reuters

Muslims perform the Eid al-Adha morning prayer around the Kaaba, Islam's holiest shrine, at the Grand Mosque in Saudi Arabia's holy city of Mecca | AFP

Men attend Eid al-Adha prayers, held on the athletics track of the Dinamo stadium in Bucharest, Romania | AP

Children sit by a cleric reading the Koran at a mosque in Arbil, the capital of the autonomous Kurdish region of northern Iraq | AFP

A man carries a sacrificial sheep near a mosque during the celebrations of Kurban Ait in the Almaty Region, Kazakhstan | Reuters

Muslim worshipers gather for Eid al-Adha prayers next to the Dome of the Rock shrine at the Al Aqsa Mosque compound in Jerusalem's Old City | AP

Muslim children play during Eid al-Adha celebrations after prayers at the Sir Ali Muslim Club Ground in Nairobi, Kenya | Reuters

Palestinians hold Eid al-Adha prayers by the ruins of the Al-Rahma mosque destroyed by Israeli air strikes in Khan Younis, Gaza | Reuters

A man squats as he carries a sheep during a competition to mark the holiday of Kurban Ait, also known as Eid al-Adha, in Almaty, Kazakhstan | Reuters

Palestinians hold prayers by the ruins of al-Al Rahma mosque in Gaza | Reuters

A girl takes part in celebrations for Eid al-Adha prayer at a public park, outside El-Seddik Mosque in Cairo, Egypt | Reuters

Muslim pilgrims gather at top of the rocky hill known as the Mountain of Mercy, on the Plain of Arafat, during the annual Hajj pilgrimage, near Mecca, Saudi Arabia | AP