The attack halted a ceremony meant to honor victims of last month’s earthquake. Voodoo believers gathered in a seaside slum where thousands of earthquake survivors are living in tents and depending on food aid. Praying and singing, the group was trying to conjure spirits to guide lost souls when a crowd of evangelicals started shouting.

Some threw rocks while others urinated on Voodoo symbols. When police left, the crowd destroyed the altars and Voodoo offerings of food and rum. Religious tension has increased since the earthquake and some Voodoo practitioners say they’ve converted to Christianity, fearing that the quake was a warning from God or that they’ll lose out on the aid they need to survive.