Watch Clip Explosions hit Crimea as Ukraine vows to retake territory 3m 53s For the second time in a week there were mysterious explosions in Russian-occupied Crimea. A Russian ammunition depot blew up Tuesday in the peninsula's northeast, less than a week after explosions destroyed multiple Russian jets at the Saki Air Base. Ukraine has not officially taken responsibility. This as violence continues near the Zaporizhzhia nuclear power plant. Nick Schifrin reports.