A Russian drone attack on a bus in northeastern Ukraine killed at least nine people and injured seven others, Ukrainian officials said Saturday, just hours after the two countries met for the first direct peace talk in three years.

ISTANBUL, Turkey (AP) — Russia and Ukraine held their first direct peace talks in three years Friday, gathering in Istanbul for Turkish-brokered negotiations, but officials and observers expected them to yield little immediate progress on stopping the more than three-year war.

The drone strike has reignited criticism of Moscow’s negotiating posture after Friday’s high-profile talks in Istanbul yielded no breakthroughs.