An army officer, along with more than a dozen soldiers, made the announcement on state television in an address to the nation on Monday night.
Captain Sidsore Kader Ouedraogo declared that Kabore was ousted “given the ongoing degradation of the security situation” in Burkina Faso and the “incapacity of the government” to unite the population.
He made the statement as spokesperson for a previously unknown entity, the Patriotic Movement for Safeguard and Restoration, or MPSR, its French language acronym.
One of the coup leaders told CNN that the president had signed his resignation and that he was being kept in a “safe place” in the West African country.
Kabore’s location remains unknown; on Monday afternoon, a message was posted from his Twitter account asking those involved in the insurrection to lower their arms.
The United Nations Secretary-General AntÃ³nio Guterres is concerned about the whereabouts of President Kabore and is following developments in Burkina Faso closely, his spokesman Stephane Dujarric said in a Monday statement.
“The Secretary-General is following developments in Burkina Faso with deep concern. He is particularly worried about the whereabouts and safety of President Roch Marc Christian KaborÃ©, as well as the worsening security situation, following the coup carried out on January 23rd by sections of the armed forces,” it said.
Kabore has not been seen in public since fighting broke out around the presidential palace in the capital, Ouagadougou, on Sunday, according to the journalist working for CNN.
Gunshots were reported in that area of the capital and helicopters were also heard overhead, according to the journalist.
The soldiers told CNN they are angry at the government’s handling of jihadist attacks in the country, and believe Burkina Faso is better off under military rule right now.
Pictures from Ouagadougou on Monday showed armed vehicles and soldiers parked outside the headquarters of the state broadcaster, Radio TÃ©lÃ©vision du Burkina (RTB).
ECOWAS “holds the military responsible for the physical integrity of President Roch Marc Christian KaborÃ©,” the statement added.
ECOWAS demanded that the “soldiers return to the barracks, maintain a Republican situation and favor dialogue with the authorities to resolve problems.”
“In the wait for a clarification, we recommend that you avoid non-essential movements during the day and do not go out at night,” the message said.
Two Air France flights scheduled for Monday evening were also canceled, according to the embassy.
Reuters reports that frustration has risen in Burkina Faso in recent months, following the killings of civilians and soldiers by militants, some of whom have links to Islamic State and al Qaeda.
The news agency said sustained gunfire rang out from military camps in the West African country on Sunday, as soldiers demanded more support for their fight against Islamist militants.
Protesters came out to support the mutineers on Sunday and ransacked the headquarters of KaborÃ©’s political party, Reuters reported.
The government declared a curfew from 2000 GMT to 0530 GMT until further notice and closed schools for two days.
The turmoil in Burkina Faso comes after successful military putsches over the past 18 months in its West African neighbors Mali and Guinea, where the army removed President Alpha Conde last September.
West Africa, which until recently appeared to have shed its reputation as Africa’s “coup belt,” remains susceptible to unrest.
Burkina Faso is one of the poorest countries in West Africa — despite being a gold producer.
Its army has suffered heavy losses at the hands of Islamist militants, who control swathes of the country and have forced residents in those areas to abide by their harsh version of Islamic law, Reuters reports.
CNN’s Sam Mednick reported from Ouagadougou and Niamh Kennedy reported from Dublin.