Russian forces enter east Ukraine
Russian forces have entered east Ukraine, according to Ukraine's acting interior minister Arsen Avakov.
Reports from the BBC, Al Jazeera and CNN have quoted Mr Avakov as saying that three tanks had crossed the Russian border into rebel-controlled territories of the east, triggering a conflict.
A quote from Mr Avakov that appeared on Al Jazeera read: "We have observed columns passing with armoured personnel carriers, other armoured vehicles and artillery pieces, and tanks which, according to our information, came across the border and this morning were in Snizhne."
However, Russia denied the reports, labelling Mr Avakov's statement as "another fake piece of information", according to the BBC.
Sources: BBC, CNN, Al Jazeera