Mali, Burkina Faso and Niger, three countries under military rule, signed a security agreement for mutual defense against terrorism or foreign aggression.
Eighteen soldiers were killed when "terrorists" struck an army camp in western Niger, the government said Tuesday, adding the US and France had provided air support to help repel the assault.
At least 95 people were killed in an overnight attack on an ethnic Dogon village in central Mali, local officials said on Monday, the latest bout of ethnic violence fueling the country's security crisis.