After a recount of petition signatures, Indiana state election officials ruled that Rick Santorum will appear on the state's presidential ballot.

According to the Indianapolis Star, Indiana election officials ruled on Thursday that Santorum did in fact have the minimum 500 petition signatures in each of the state's districts to qualify for the ballot. The ruling is a reversal of a previous count that said Santorum was eight signatures short in the Marion County district to qualify for the ballot. 

Earlier this month, Santorum tweeted that his campaign found additional petition signers and expected to make it onto the ballot.

The Indiana ballot news comes as Santorum continues his rise in the polls and appears to be posing a serious challenge to Mitt Romney. A number of key state and national polls have found Santorum neck and neck with or even ahead of the former Massachusetts governor, including in Romney's native state of Michigan, which he won during his 2008 presidential run. 

Indiana's primary is May 8.