INDIANAPOLIS (AP) -- The owners of some of Indiana's microbreweries are worried that a state law limiting the tax breaks they can receive could slow the growth of the state's microbrewery industry.

Indiana has 34 breweries that last year made nearly 50,000 barrels of craft beers. But the vast majority are produced by three microbreweries, each of which is quickly approaching a state-imposed production cap of 20,000 barrels of beer a year.

The Indianapolis Star reports that under a 1993 state law, breweries that exceed that amount will see their state taxes nearly double.

Omar Robinson of Sun King brewery says he could be forced to close tasting rooms or stop distributing beer if Sun King exceeds the production limit. He and other brewery owners want the production limit raised to 60,000 barrels.