Muzhenko recalled that "there is intelligence information, which we get, and there is intelligence data, which should be verified."
"Last year, 90 percent of such information was not confirmed throughout the summer period of the anti-terrorist operation [in eastern Ukraine]," Muzhenko said.
He, in particular, attributed the fact to what he described as an active operation by the opposite side to spread misinformation.
"The General Staff only analyzed what had credibility and demanded attention, namely about 5-10 percent [of all intelligence information]," he said.
"It means that our potential retaliation could have led to a full-scale war with Russia, which would consider itself a party that was attacked," he pointed out.
Kiev has repeatedly accused Russia of sending its troops and weapons to supporters of the Donbass region's independence in eastern Ukraine, allegations that Moscow vehemently reject