Police say that 12 people were injured during a Mother's Day parade shooting in New Orleans.

NEW ORLEANS, UNITED STATES (MAY 12, 2013) (NBC) -  At least 12 people were wounded when gunmen opened fire during a Mother's Day parade in New Orleans on Sunday (May 12), police said.

Police said it's unclear what started the gunfire but they believe three suspects might be involved.

A police spokesman earlier told reporters that a 10-year-old girl was grazed by a bullet in the shooting. She was in good condition. No deaths were reported. And, so far, no arrests have been made.