[UPDATE BELOW] We've just received a tip that there was just a shooting on the L Train platform at Union Square. Our tipster writes, "It happened at probably 11:05. As everyone stepped out of the train, which was 8th Ave bound, a bunch of shots rang out like an automatic weapon. It was towards the eastern end of the train. Everyone ran the opposite direction, as did I. I'm not sure about much else except there were a bunch of cops running down there and it seemed like maybe there were some red lights on as if someone pulled an alarm afterward or something... A co-worker of mine was also on the train and she said she ran the wrong way and saw someone who was shot."

UPDATE 11:35: Twitter user "sha_bk_boogie" tweets: "WTF just got off the L train @ union square and someone started shooting!! Got watch the news to see what happened cause I was ghost." Other tweets are filtering in, so it looks like something did happen. Our contact at NYC Transit is looking into the incident.

UPDATE 11:42 a.m.:A spokesman for NYC Transit tells us that Police officers assigned to Union Sq (there is a Police District Office at the station) responded to the platform and discovered it was kids playing with fireworks. Guess our tipster's co-worker who "saw someone shot" has some 'splainin to do.