Malian special forces entered the Radisson Blu in the capital Bamako on Friday after Islamist gunmen attacked the luxury hotel and took hostages, a witness and a police source said.
Special forces storm hotel
"They've penetrated inside the hotel. The operations are under way," the police source said.
The U.S. Embassy tweeted that it was "aware of an ongoing active shooter operation at the Radisson Hotel," and instructed its citizens to stay indoors.
An Islamist group claimed responsibility for the death of five people last March in an attack on a restaurant in Bamako popular with foreigners.
JOIN OUR PULSE COMMUNITY!
Eyewitness? Submit your stories now via social or: