A free concert by rapper Tyler, the Creator at Fox Theater in Boulder, Colo., seems to have gotten out of hand, as reports of a “riot situation” are surfacing on Twitter.

https://twitter.com/activistash/status/311267821302710272

The free, all-ages show was presented by Tumblr and tickets were given out on a first-come, first-served basis.

https://twitter.com/itsmefranswa/status/311269777748406272

The scene looks reasonably calm from this angle; is it just hype, or a bona fide riot? Police are no strangers to shows by Odd Future, the rap collective of which Tyler is a member.

It looks as though reports of a “riot” are premature, but police are on hand to make sure things stay that way.

Tyler has issued a tweet to implore his more enthusiastic admirers to mind their manners.