He said “hundreds” were killed and injured.
“Ten months after the war, to consider the enemy a fool is dangerous and criminal,” said Andrei Medvedev, deputy speaker of the Moscow city legislature.
Samara governor Dmitry Azarov said that among the victims were residents of his region, adding that a hotline had been set up for their relatives.
On social media, some accused the Russian authorities of downplaying the death toll.
“Dear God, who would believe the figure of 63? The building is completely destroyed,” Nina Varnikh, a Russian, wrote on VKontakte, the country’s biggest social network.
An announcement on social networks urged Russians to collect clothing, medicine and equipment for those who survived the strike.
“Whatever the mobsters had, remains under the rubble,” the announcement said.
Another announcement said residents of four cities in the region – Samara, Tolyatti, Syzran and Novokubyshevsk – would gather on Tuesday to mourn the soldiers.