INDIANAPOLIS — An elections official in Indiana is saying GOP presidential contender Rick Santorum still lacks the signatures needed to make it on the state's ballot.

Santorum has questioned Marion County's decision to throw out 49 signatures. But Marion County voter registration official Cindy Mowery said Monday that the signatures are still invalid.

The number would be enough to put Santorum on Indiana's ballot.

Santorum spokesman Hogan Gidley said the campaign believes the signatures were wrongly disqualified and will keep fighting through Indiana's ballot process. Former House Speaker Newt Gingrich, Texas Rep. Ron Paul and former Massachusetts Gov. Mitt Romney all qualified to compete in Indiana's May 8 primary.