Two Ames men were arrested Thursday and charged with assaulting another man who police said stabbed them in self-defense during an incident in Campustown on Saturday.

Shayne Wiesenhofer, 20, 129 Wilmoth Ave., and Jeffrey Lundgren, 22, 3219 Ellis St., have been charged with one count each of second-degree robbery, which is a Class C felony, and two counts each of assault, which is a serious misdemeanor.

Around 12:50 a.m. Saturday Ames Police responded to a call from Kum & Go, 203 Welch Ave., after Lundgren entered the store with blood on his shirt saying he had been stabbed.

Police were also dispatched to ISU Parking Lot 60 at Towers, where Wiesenhofer was found between two parked cars.

Based off of statements taken from Wiesenhofer, Lundgren and witnesses, officers discovered Luke LeClere, 19, Des Moines, and Nick Loffredo, 23, Des Moines, were also involved in last Saturday’s incident.

Ames Police Cmdr. Randy Kessel said it appears Wiesenhofer and Lundgren met LeClere and Loffredo earlier that night at a party on Knapp Street.

Kessel said after talking with witnesses from the party, it appears Wiesenhofer and Lundgren assaulted Loffredo in an attempt to steal his backpack.

They then moved to LeClere, who was also beaten, and in self-defense LeClere produced a knife and stabbed both his attackers. LeClere and Loffredo face no charges at this point.

Later that morning, an officer found a knife on top of a garbage can behind Pizza Pit, 207 Welch Ave., which has been sent to the state Division of Criminal Investigation Criminalistic Laboratory for testing.

“It is an integral portion of this investigation and we want to make sure it’s the right one,” Kessel said.

“We have enough probable cause to believe it was the weapon used in the event.”

Investigators are still going over witness statements to determine what was in Loffredo’s backpack, Kessel said.

“We have information that there were amounts of marijuana, enough for personal use, in the backpack,” Kessel said.

“At this point we do know there was not enough for a charge of delivery.”