Moscow, Russia - April 5, 2007 - Sistema (LSE: SSA), the largest private sector consumer services company in Russia and the CIS, today announced that it has acquired an additional 9.75% stake in Sitronics (LSE: SITR), a leading provider of telecommunication solutions in Russia. As a result of the transaction, Sistema now owns 60% of Sitronics issued share capital. The shares were acquired from Sistema subsidiary, ECU GEST HOLDING S.A. The acquisition of additional stake in Sitronics was made in accordance with current restructuring and planned consolidation of assets of the Group aimed at optimizing the ownership structure.