Dozens of protesters were killed in Kazakhstan overnight as they clashed with security forces in the Central Asian country as a Russia-backed security bloc agreed to send in military forces in a bid to quell nationwide unrest, authorities said on Thursday. There was no immediate confirmation on the number of fatalities among protesters, though state-run news channel Khabar-24 TV reported that at least 13 security officers died, according to city officials cited by the network. Saltanet Azirbek, a spokeswoman for the Almaty police department, told the channel that “dozens of attackers were liquidated” during demonstrations overnight on Wednesday that saw government buildings broken into and set ablaze. The country’s ministry of health said more than 1,000 people across the nation were injured as a result of the unrest, Khabar 24 TV reported, adding that so far, 2,000 people have been arrested. “Over 1,000 people were hurt as a result of mass …