MOSCOW (AP) — The Kremlin on Wednesday renounced the right to send troops into Ukraine and voiced support for a peace plan, but the West said Russia must do much more to stop the fighting in eastern Ukraine if it wants to avoid a new, more crippling round of sanctions.

A cease-fire, already fragile, is set to expire Friday, the same day that Ukraine signs a pivotal economic agreement with the European Union and the day that the EU and U.S. may consider further punitive measures against Russia.