The security of the Algiers Underground will be assured by 400 policemen and many security guards, Minister of Transport Amar Tou said Thursday in Algiers. "The security in of the Algiers Underground will be assured by 400 policemen and 400 security guards who have got specialized training," the minister told press on the sidelines of a visit to the underground station of the Grande Post that opened its doors to the public for an evening.