Memorial services will be held across Russia, from Novgorod in the northwest to Khabarovsk in the Far East.
Numerous events will be held across Russia on Friday, to mark the Day of solidarity in fight against terrorism and the final day of the Beslan school siege, in which 334 people were killed.
On September 1, 2004, Chechen separatists herded more than 1,100 teachers, parents and children into the gym at Beslan's School No. 1. The gym was rigged with explosives and a total of 334 hostages, including 186 children, lost their lives when the siege came to its bloody conclusion three days later.
The Beslan school siege is the deadliest terrorist attack ever to take place in Russia and saw the largest number of child victims in any terrorist act anywhere in the world. More than 120 of the survivors were left disabled, including 70 children.
Memorial services will be held across Russia, from Novgorod in the northwest to Khabarovsk in the Far East.
The third day of mourning in the town of Beslan in the North Caucasus republic of North Ossetia will begin with a memorial service in yard of the ruined School No. 1. At 13:05 Moscow time [9:05 GMT], the time when the school's gym was blown up, a church bell will ring twice to mark the blasts, followed by a minute of silence.
Then, 334 white balloons will be released into the sky.
The ceremony will continue near the two monuments at the town's cemetery: the Tree of Grief and a monument to the Special Task Force servicemen killed while releasing the hostages.
Numerous mourning ceremonies will also be held in Moscow, which saw two deadly terrorist attacks early this year.
Flowers will be laid to the monument of Beslan victims, unveiled on June 1 in front of a 16th century Moscow church, which was donated to Moscow's Ossetian community in 1996.
The largest public gathering is expected to take place near the the Dubrovka theater in southeast Moscow, where some 40 terrorists took hostage an audience of over 900 people in October 2002. The siege and subsequent police operation left 130 people dead.
Memorial events will also be held at the Park Kultury and Lubyanka stations, where the first major terrorist attacks in the Russian capital for six years took place late this March. Twin powerful blasts that hit one of the Moscow metro's busiest lines during the morning rush hour killed 39 people and injured 78.
Victims of the 1999 apartment building blasts, in which more than 200 people were killed, will also be remembered, as well as those killed in 2003 in twin blasts during the Krylya rock festival near the Tushino airfield.
RIA Novosti