Speaking at a briefing, Churiy also said he expects offers of dollars to increase in the coming weeks, Reuters said.

Read alsoNBU reveals volume of Ukraine's multi-billion dollar debt to IMF"Since the start of the month we have sold around $160 million. For now, reserves are going down," he said. 

As UNIAN reported earlier, Ukrainian Prime Minister Volodymyr Groysman says January's depreciation of the hryvnia is due to a decrease in the country's export receipts and the need to carry out external payments. 

"The rate is freely regulated ... For example, in January, we are observing a decrease in Ukrainian exports. If there is a decrease in exports, less currency comes into Ukraine. Moreover, Ukraine has been making external payments," the prime minister told Ukraine's ICTV channel.