Story highlights Indiana GOP leaders received a series of threats over the weekend

The party selected its 57 delegates to the national convention Wednesday morning

Washington (CNN) The Indiana Republican Party on Thursday released the names of its 57 delegates to the national convention, reversing course on its initial decision to withhold the names until they were certified by the Republican National Committee.

The decision comes just days after state party leaders reported receiving threatening emails. Indiana State Police investigated the emails, but announced Wednesday they were not criminal.

Indiana party leaders selected 27 of their 57 delegates in private Wednesday. The selections were made ahead of the state's May 3 primary because the RNC requires delegate names be submitted at least 45 days before the convention in Cleveland.

Many delegates appear to be supporters of John Kasich, and one delegate is co-chair of Donald Trump's campaign in Indiana -- but many more appear unaffiliated. Most of Indiana's Republican powerbrokers had been backing Jeb Bush until he dropped out in February.

Read More