situation. it is terrifying to watch the images on the screen, fredricka. as you mention, this is near the tree of life synagogue in the well known historic jewish neighborhood of squirrel hill in pittsburgh. saturday is shabbat, busiest day of any synagogue. services according to the website start at 9:45 a.m. eastern at the tree of life. at cnn here, we first heard reports of active shooter after 10:20 eastern this morning. and it was a short time ago we got a very brief, blunt, impromptu briefing from law enforcement and local leadership talking about active gunfire, multiple casualties. we are aware that local affiliates put a number on the casualties. cnn has yet to be able to pin those down and verify that. but it is a live scene with officers holding a perimeter, perhaps even at this point if they can sweeping the structure. again, we still don't know, fredricka, whether or not the