NEW ORLEANS - New Orleans police vowed to swiftly track down the gunmen who wounded 19 people at a neighbourhood Mother's Day parade, the latest case of violence flaring up around a celebration in the city this year.

Detectives were conducting interviews, collecting any surveillance video they could find and gathering evidence from the scene where gunmen opened fire Sunday on the parade of hundreds of revelers. Cell phone video taken in the aftermath of the shooting shows victims lying on the ground, blood on the pavement and others bending over to comfort them.

At least three of the victims were seriously wounded. Of the rest, many were grazed and authorities said that, overall, most wounds were not life threatening. No deaths were reported.

The victims included 10 men, seven women, a boy and a girl. The children, both 10 years old, were grazed and in good condition.

It's not the first time gunfire has shattered a festive mood in the city this year. Five people were wounded in January after a Martin Luther King Jr. Day parade, and four were wounded in a shooting in the French Quarter in the days leading up to Mardi Gras.

"The specialness of the day doesn't appear to interrupt the relentless drumbeat of violence," Mayor Mitch Landrieu said at a news conference outside a hospital where victims were being treated Sunday night.

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