Shia Muslims are gathering at shrines and mosques to mark a 10-day event that will culminate on Wednesday (12 October) with the day of Ashura, which commemorates the death of the Prophet Muhammad's grandson Imam Hussein at the battle of Karbala, now in southern Iraq, in AD 680.
Many devotees beat their heads and chests with chains and knives, and gash their heads with swords to show their grief and echo the suffering of Imam Hussein.
Shia men flagellate themselves during a ceremony marking Ashura in Karbala, Iraq
Reuters
A Shia man flagellates himself during a ceremony marking Ashura in Karbala, Iraq
Reuters
Young Kashmiri Shia Muslims flagellate themselves during a procession in Srinagar
Tauseef Mustafa/AFP
Blood runs down a Kashmiri Shia Muslim man's face after he beat himself during an Ashura parade in Srinagar
Tauseef Mustafa/AFP
Iraqi Shia men beat themselves with chains during a parade in the southern city of Basra
Haidar Mohammed Ali/AFP
Afghan Shia Muslims use chains and blades during ritual self-flagellation as part of Ashura commemorations at a mosque in Kabul
Shah Marai/AFP
A Shia Muslim man beats himself with chains and blades at a mosque in Kabul
Shah Marai/AFP
People clean a blood-covered floor after ritual self-flagellation as part of Ashura commemorations at a mosque in Kabul
Shah Marai/AFP
Iraqi Shia Muslims carry torches during a parade as part of Ashura commemorations in the holy city of Najaf
Haidar Hamdani/AFP
Shia Muslims spin flaming torches during commemorations for Ashura in Najaf, Iraq
Alaa Al-Marjani/Reuters
A man spins flaming torches during Ashura celebrations in the holy city of Najaf, Iraq
Alaa Al-Marjani/Reuters
An Iraqi Shia man performs during the reenactment of the Battle of Karbala, in the holy city of Najaf
Haidar Hamdani/AFP
Children take part in an Ashura parade in the holy city of Najaf
Haidar Hamdani/AFP
A man performs during the reenactment of the Battle of Karbala during an Ashura parade in Baghdad's northern district of Kadhimiya
Ahmad al-Rubaye/AFP
Iraqi Shia children take part in the reenactment of the Battle of Karbala in Baghdad's northern district of Kadhimiya
Ahmad al-Rubaye/AFP
A child beats himself with chains during a parade in Baghdad's northern district of Kadhimiya
Ahmad al-Rubaye/AFP
Iraqi Shia men beat themselves with chains during a parade in Kadhimiya, Baghdad
Ahmad al-Rubaye/AFP
Shia Muslims commemorate Ashura in the holy city of Karbala, Iraq
Reuters
An Afghan Shia Muslim child watches devotees beat themselves during Ashura commemorations at a mosque in Kabul
Shah Marai/AFP
A man says his prayers at a Shia mosque in Islamabad, Pakistan
Caren Firouz/Reuters
Shia Muslim men are stopped by Indian policemen while trying to participate in an Ashura procession during a curfew in Srinagar
Danish Ismail/Reuters
A man polishes a religious symbol in preparation for the Ashura procession in Peshawar, Pakistan
Fayaz Aziz/Reuters
Pakistani rangers stand guard during a Shia Muslim procession in Quetta
Banaras Khan/AFP
Hezbollah members drive a pick-up truck mounted with a mock rocket as they parade during a procession in Saksakieh in southern Lebanon
Ali Hashisho/Reuters
A veiled woman and young boy hold a toy gun during a parade by fighters of Lebanon's Shia Muslim Hezbollah movement in Saksakieh
Fighters of the Hezbollah movement take part in a parade marking the seventh day of the Ashura mourning period in the southern Lebanese town of Saksakieh
Mahmoud Zayyat/AFP
The mourning period of Muharram comes at a particularly turbulent time in the Middle East, which has seen an increase in sectarian violence alongside the spread of the Islamic State and other extremist Sunni groups, who believe Shia Muslims are apostates deserving death. Shia Muslims, who make up nearly 15 per cent of the Islamic world, mourn for a month as part of the festival.