Republican Rep. Dan Burton of Indiana says he won't seek re-election to a 16th term.

Burton told members of the Indiana House on Tuesday that he'll serve out his term but not run again. The 73-year-old didn't elaborate on his decision during his brief address to lawmakers.

Burton narrowly survived tough GOP primary battles in his past two campaigns. He was elected to his 15th term in November 2010.

He first won election in 1982 to the 5th district, which remains heavily Republican under new electoral boundaries state legislators approved last year. It includes all of Hamilton County and the north side of Indianapolis, but lost some rural counties closer to Fort Wayne that Burton carried on his way to winning the 2008 and 2010 primaries.