MOSCOW, Sept 11 (Reuters) - Russia will drop two of 13cities bidding to stage matches for the 2018 World Cup, head ofthe local organising committee (LOC) Vitaly Mutko said onTuesday. Saransk, Volgograd, Yaroslavl, Kaliningrad and Rostov arethe most under threat. "We have completed the formal review of all the candidatecities," Mutko, who is also Russia's Sports Minster, was quotedas saying by the ministry press office. "As of today we still have 15 stadiums located in 13 citiesbut we plan to use only 12 venues in 11 cities, therefore ourtask is to pick the two cities that must be cut. ... More...