India, Nov. 10 -- US Secretary of State Marco Rubio on Tuesdaydescribed the Russia-Ukraine talks in Abu Dhabi as "very productive", adding that Washington hopes to eventually expand the negotiations to include European countries in a trilateral format.

"We think the trilateral (format) should eventually include our European partners at the table as well, because they are a part of solving this problem for the long term," he said in Paris after the first day of talks in the UAE capital, according to AFP.

The first day of US-led negotiations between Russia and Ukraine in Abu Dhabi concluded on Tuesday, with talks set to resume on Wednesday. The discussions, aimed at ending more than four years of war, lasted several hours and marked the f...