Rubio called the US, Russia and Ukraine talks in Abu Dhabi fruitful.
"The talks in Abu Dhabi seem to have been very productive. Clearly, much work remains in this area.
This does not mean that a solution will be found in the next 24 hours or something like that. But it is very important that the Europeans participate in the negotiations.
Our goal is to eventually expand the tripartite format so that not only the US, Ukraine and Russia, but also European countries will be represented at the negotiating table," stated the US Secretary of State.