LA CROSSE, Wis. -

Organizers of the Festival Foods Grandad Half Marathon say they're working with local law enforcement agencies to "increase participant and spectator safety" for the event on Sunday, May 4, following the tragedy at the Boston Marathon.

Three people died and more than 170 people were injured Monday when two bombs exploded near the finish line of the Boston Marathon. President Barack Obama said it is an "act of terrorism."

"The Festival Foods Grandad Half Marathon, hosted by the City of La Crosse Parks and Recreation Department extends our deepest sympathies to those affected by yesterday’s tragedy in Boston," said event organizer Jay Odegaard.

Uniformed police and trained medical professionals will be on site along the half marathon route and "we will do everything in our power to ensure a safe and successful event," Odegaard said.

"Yesterday’s events shook the running community not only in Boston, but around the world," said event director Jay Odegaard. "It’s unfortunate that the safety of something as positive and uplifting as running a marathon is now being questioned."