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.
The RPS has named four award winners in its 160th International Photography Exhibition, the world's longest running photographic exhibition.
The US territory of 3.4 million people has struggled through nine days with virtually no electricity and shortages of fuel and clean water in the wake of the most powerful storm to hit the island in nearly 90 years.
Catalonia's interior minister says the region's authorities are aiming to ensure that the disputed referendum will take place peacefully.
Reporters have finally been allowed to venture into Myanmar's northern Rakhine state, formerly home to hundreds of thousands of Rohingya Muslims who have fled into Bangladesh.
Syrian Democratic Forces have seized 80 to 90 percent of the city and have hemmed the jihadists into a few districts in the north of the city.
Archaeologists found the remains of nine men, all between the ages of 25 and 30, who were sacrificed as part of a Sican ritual.
The number of refugees arriving in Bangladesh since 25 August has been estimated at 480,000 – 60% of them children.
Bali is being shaken daily by hundreds of tremors from the mountain, which volcanologists say indicates a high chance of an eruption.
The 2018 Sony World Photography Awards, one of the world's leading photography competitions, are now open for entries.
The storm-battered US island territory has struggled through days with virtually no electricity, and more misery could be on the way thanks to a dam that might fail at any moment.
Young Rohingya refugees' drawings are filled with traumatic scenes such as people being shot or burned alive by the military.
At least 200 NFL players knelt, sat, prayed or raised a clenched fist during the Star Spangled Banner. Three teams didn't even take the field until the national anthem was over.
The fighting in Marawi is so intense that it took soldiers a whole week just to cross one street in the embattled city.
The week's best photos, from the Rohingya refugee crisis and Mexico City earthquake, to Hurricane Maria, Catalonia independence and St Louis protests.