The first round of talks aimed at stopping the fighting between Ukraine and Russia ended Monday with no agreement except to keep talking, while an increasingly isolated Moscow ran into unexpectedly fierce resistance on the ground and economic havoc at home.

Five days into Russia’s invasion, the Kremlin again raised the specter of nuclear war, while an embattled Ukraine moved to solidify its ties to the West by applying to join the European Union — a largely symbolic move unlikely to sit well with Russian President Vladimir Putin, who has long accused the U.S. of trying to pull Ukraine out of Russia’s orbit.

A top Putin aide and head of the Russian delegation, Vladimir Medinsky, said that the talks lasted nearly five hours and that the envoys “found certain points on which common positions could be foreseen.” He said they agreed to continue the discussions in the coming days.

As the talks wrapped up, several blasts could be heard in Kyiv, though few details were immediately known. Russian troops, who are attacking Ukraine on multiple fronts, have been advancing slowly on the capital city of 3 nearly million people.