Paris (CNN)Arrests have been made in connection with a coup attempt in Niger overnight, according to a statement sent to CNN by a diplomatic source in the country.
Arrests made in Niger attempted coup, days before President-elect's inauguration
"Several people linked to the coup attempt" have been taken into custody, but authorities are searching for others involved, the source said.
The incident comes two days before the swearing in of President-elect Mohamed Bazoum. The former interior minister succeeds President Mahamadou Issoufou, who stepped down after a decade in power.
Earlier Wednesday, a separate diplomatic source told CNN heavy gunfire was heard outside Niger's presidential palace, resulting in more than one hour of heavy shelling near the presidency.
Asked to confirm it was an attempted putsch, the diplomatic source said: "Yes it's the army. Which is predominately from the west of the country, which is the heartland of the opposition to Bazoum."
Both outgoing and incoming presidents were reported to be safe, the source said.
"The government condemns this coward and backwards act that had the intention to attack the democracy and the rule of law that our state has embarked upon as we have seen during these recent elections which were democratic, free and fair and lauded as such by the international community," the statement said.
A spokesperson for the UN Secretary-General in New York has said he is "following with great concern the unfolding developments in the country" and "urges all involved to desist from any form of incitement that threatens democratic consolidation and the stability of the country."
CNN has made attempts to reach the Army and Presidency for comment.