Armed militants launched an attack on a market in Burkina Faso's Sanmetenga province, leaving 36 civilians dead.
Officials said the terrorists targetted those entering the Alamou market before burning the structure down.
"These repeated attacks on innocent civilians call for real cooperation between the defence and security forces," the government said.
It was not immediately clear who was responsible for the attack.
President Roch Marc Kabore has announced a two-day mourning period.
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US, Iran at odds on nuclear inspections, frozen assets in deal to end war
US President Donald Trump has stated on Tuesday that Iran had agreed to nuclear inspections into "infinity," while Tehran said it had made no such concession in negotiations, raising questions about the viability of their fragile peace deal.
Libya's eastern government bans entry of nationals from four African countries
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New Lebanon-Israel talks begin in shadow of US-Iran deal
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EU hosts Taliban officials in Brussels for first time
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