"We are working with the Nigerian side to resolve the situation as soon as possible. At the moment we are waiting, and so are the crew," Romanov was quoted as saying by the radio station.
He confirmed that the cargo on the plane belonged to French peacekeepers.
The press attache said that the French peacekeeping mission in Chad had chartered the Russian plane with Russian crew to transport the cargo. The Russian side has nothing to do with the cargo, according to Romanov.
On Saturday, Nigeria detained a Russian cargo plane en route from the Central African Republic to Chad that, according to the embassy's Twitter account, carried military equipment belonging to France.