More details from the Austin American-Statesman
http://www.statesman.com/blogs/content/shared-gen/blogs/austin/blotter/entries/2010/01/21/authorities_reporting_shots_fi.html?cxntcid=breaking_news
No injuries reported yet.
They have the name of a perp - Fausto Cardenas - who has been taken into custody.
Must not have hit anybody though.