...the leader of the ultra-nationalist Right Sector threatened to withdraw volunteers fighting on the government side. 

Dmytro Yarosh said Right Sector would launch a "campaign in Kiev" if its demands, including the release of detained members, were not met within 48 hours. 

He called on President Petro Poroshenko to "immediately bring order" to the Interior Ministry, which he accused of harbouring "revanchist forces".

For Right Sector's threats of withdrawing support from Kiev to have any meaning, a significant number of Nazi militants would have to be fighting under the banner of Right Sector in the first place, contradicting months of claims across Western media claiming otherwise. 

The admission across the Western media of this apparent "falling out" between Right Sector and the regime in Kiev comes amid increasing public awareness of Neo-Nazis spearheading Kiev's military operations in eastern Ukraine. The London Telegraph would report in its article titled, "Ukraine crisis: the neo-Nazi brigade fighting pro-Russian separatists," that: