INDIANAPOLIS - A 64-year-old man has been hospitalized after he was attacked along the Monon Trail, police said.

Officers were called to the 2100 block of the trail just after noon Sunday on a report of a person assaulted.

Jim Knapp said he was riding his bike when he was attacked.

Knapp told police he didn't remember the attack.

Knapp's family told RTV6 he was only carrying his cell phone and $3 when he was beat up and robbed.

Elaine Delbecq, Knapp's wife, said her husband has  broken ribs, a broken clavicle, concussions and cuts that required stitches.

A security officer at a nearby church said he heard a loud noise and saw three teenage boys on bikes riding quickly away from the Monon.

That security officer was also the one who called Knapp's family to alert them to what happened.

"And (he) said, 'Do you know somebody who rides their bike on the Monon Trail?' And I said yes and they said, 'Well they've been assaulted and they're bleeding and the ambulance is here,' and, you know, you just freak out," said Delbecq.

Delbecq said Knapp has been using the Monon Trail almost every day for the past 10 years, and this is the first time he's had any problem.

"I can't reconcile it in my mind at all, not one little bit. It's senseless it's ridiculous, the violence I don't understand violence," she said.

Police said there have been two assaults and two robberies along the Monon Trail in 2012.