YEREVAN.- A book of mourning was opened in the Russian embassy in Yerevan for the victims of Bulgaria cruise ship tragedy.

July 12 is declared a day of mourning in Russia. In a day of mourning all the churches of the Russian Orthodox Church held memorial services for victims. Russian TV channels and radio stations will not broadcast entertainment programs and advertising.

Two-decked riverboat Bulgaria sank on Monday with 205 people on board. A total of 79 people were rescued. The death toll reached 58, while over 50 are still missing, RIA Novosti reports.