(Jae C. Hong/Ap Photo)

ABC News projects that Rick Santorum will win the Louisiana Republican primary.

Exit polls indicated that Louisiana's primary saw a high turnout of voters who identified as very conservative - a group that has typically favored Santorum. Also helping Santorum was a high turnout of religious voters - nearly two-thirds of voters in today's primary said that they go to church at least once a week.

Santorum has so far performed very well in the South, winning primaries in Alabama, Mississippi, Oklahoma and Tennessee. He was favored to carry Louisiana. Recent polling showed him with a comfortable lead over the rest of the GOP field heading into the contest.

The win may give Santorum a boost in momentum heading into the next slate of contests, which will take place in Wisconsin, Maryland and Washington, D.C., on April 3, however, it is unlikely that he will pick up a large slate of delegates here. Only 20 delegates are being allocated today, and they are being distributed with a proportional scheme, meaning it's unlikely that Santorum will take all of them.

Santorum currently has 263 delegates, ABC News projects. Romney has 563.