This ends our live blogging for October 18. Be sure to check back tomorrow for our continuing coverage.
Here is today's map of the security situation in eastern Ukraine, according to the National Security and Defense Council:
Czech and Ukrainian activists demonstrated outside an arena in Prague on October 17 during a performance by the Aleksandrov Ensemble, the official choir of the Russian armed forces. Protesters held signs calling the chorus "the music of war and occupation." Inside the concert hall, a small group of protesters holding Ukrainian, NATO, and EU flags tried to disrupt the show during a guest appearance by Czech pop star Helena Vondrackova, but were quickly escorted out. (RFE/RL)