GERMANY has joined France in expressing concern about an agreement between Mali's military rulers and a Russian security company that would bring Russian mercenaries into the African country. Diplomatic and security sources have told Reuters that mercenaries hired by the Wagner Group would train the Malian military and provide protection for senior officials. The deal is close to being agreed on, they said, "We find this extremely worrying," a German foreign ministry spokesperson said. France's foreign minister on Tuesday criticised the plans, saying such a move was "incompatible" with the French military presence in its former colony. France is worried…