Jan 2 (Reuters) - Russia said on Monday that 63 Russian soldiers had been killed in a Ukrainian New Year's Eve attack on their quarters, triggering furious criticism of the military leadership from lawmakers and pro-war bloggers.Footage posted online showed a building purported to be a vocational college in Makiivka, a city in the Russian-controlled part of Ukraine's Donetsk province, reduced to rubble.Daniil Bezsonov, a senior Russian-backed regional official, said the college had been hit by U.S.-made HIMARS rockets around midnight, just as people would have been celebrating the start of the New Year against the backdrop of a televised speech by President Vladimir Putin.Grigory Karasin, a member of the Russian Senate and former deputy foreign minister, not only demanded vengeance against Ukraine and the Western NATO alliance, whose members have been arming it, but also "an exacting internal analysis".Many have already been sent to the front to bolster a 10-month-old campaign in which Russia has been driven out of large swathes of the Ukrainian territory it had seized, and been forced to replace many of its senior commanders."