Follow all of the latest developments as they happen.
Final Summary For September 21
-- NATO Secretary-General Jens Stoltenberg has called on Russia to withdraw heavy weapons from eastern Ukraine.
-- No trucks have passed through the administrative border from mainland Ukraine to Crimea overnight, according to Oleh Slobodyan, the spokesperson for Ukraine’s State Border Service.
-- Hundreds of pro-Kyiv activists from Crimea's Tatar community and other opposition activists are taking part in the blockade of roads from Ukraine to the Crimean peninsula to protest Russia's annexation of the region last year.
-- The German government has criticized Russia for not distancing itself from plans by Russian-backed separatists to hold local elections in eastern Ukraine without consulting Kyiv.
*NOTE: Times are stated according to local time in Kyiv
Ukrainian officials have detained military recruiters for the separatist-controlled part of the Luhansk region.
The OSCE has documented the presence of tanks along the frontline near Mariupol.
The evolution of Russian aggression from RFE/RL's Radio Svoboda.
