French authorities on Friday detained a man after receiving an alert from the Iranian consulate in Paris that someone had entered carrying an explosive, the capital's police authority said. 

"The man has exited the consulate and is being" interrogated by police, it said. 

A security source earlier told AFP that the mission called in law enforcement after a witness saw "a man enter carrying a grenade or an explosive belt.". 

An AFP journalist said the whole neighborhood around the consulate in the capital's 16th district had been closed off, and a heavy police presence was in place. Paris transport company RATP on X, formerly Twitter, said traffic had been suspended on two metro lines that transit through stops close to the building.

There has been no comment on the incident from the Iranian side yet.

(With input from AFP)