MOSCOW, June 13 (Reuters) - The Russian central bank set Friday's official exchange rate at 88.2080 roubles per U.S dollar, implying a stronger Russian currency than the previous session's official rate of 89.0214.

New U.S. sanctions that forced Russia's leading exchange to halt dollar and euro trading led to a range of varying prices and spreads as trading moved over-the-counter (OTC) on Thursday, obscuring access to reliable pricing for the Russian currency. (Reporting by Alexander Marrow and Maxim Rodionov; Editing by Toby Chopra)