Shias all over the world mark the Chehlum or Arbaeen of Hazrat Imam Hussain (RA) 40 days after Ashura.
Chehlum processions kicked off in various cities of Pakistan under tight security, as cellphone services were suspended and traffic diverted from procession routes.
Millions of Shias also thronged to Karbala in Iraq for the culmination of one of the world's largest religious events.
The faithful have for days been streaming through the golden-domed mausoleum of Hazrat Imam Hussain (RA), the Prophet Muhammad's (PBUH) grandson who was killed in 680 AD by the armies of Yazid, despite the threat of militant attacks.
Many in the sea of black-clad devotees swarming the shrine walked days to reach Karbala, sometimes from cities as far afield as Basra, about 500 kilometres away by road.
PAKISTAN
People participate in a Chehlum procession in Islamabad. — AP
A man pets Zuljinah on the Chehlum of Hazrat Imam Hussain(RA). —Reuters
Teary-eyed women mourn at the Chehlum of Hazrat Imam Hussain (RA). — AFP
Children walk among the security vehicles protecting the funeral procession in Islamabad. — AFP
Women look on as the procession passes by. — AFP
A robot conducts a security sweep of the procession area as a child looks on. — AFP
Men beat their chests during the Chehlum rituals. — AFP
Security vehicles parked at the procession site. — AFP
Women cry during the Chehlum procession. — AFP
People touch a horse, symbolising Zuljinah, the horse that carried Hazrat Imam Hussain (RA) during the battle of Karbala, at the procession marking Chehlum. — AFP
People look on as men perform rituals during the Chehlum procession. — AFP
Thousands of devotees take part in the Chehlum procession. — AFP
IRAN
Men perform prayers as part of the Chehlum rituals. — AP
Men beat their chests during the Chehlum mourning. — AP
A man mourns as others look on during the Chehlum rituals. — AP
Men gather to take a procession out to commemorate Chehlum. — AP
IRAQ
Pilgrims gather as they commemorate Chehlum in Karbala, Iraq. — Reuters
Pilgrims mourn as they commemorate Chehlum. — Reuters
Female pilgrims mourn during the Chehlum rituals. — Reuters
A man cries during the Chehlum rituals at Karbala. — Reuters