Blasts heard near Russian airbase in Crimea

STORY: Videos purportedly captured at the scene, some of them posted on social media and shot from nearby tourist beaches, showed a plume of smoke. The videos could not immediately be verified.

At least 12 explosions of varying intensity were heard in the course of a minute around 3:30 p.m., two witnesses said. Three were particularly loud, triggering sparks and smoke.

Around 30 minutes later, one more blast, described by witnesses as the loudest of all, triggered two more plumes of smoke and dust.