The origin of two guns found in a park near Maria Carrillo High School's athletic fields remains under investigation by the Sonoma County Sheriff's Office.

Investigators have done ballistics tests and other forensic examinations on both handguns, .40- and a .45-caliber Glock pistols, but have found no clue as to how they got there, Sgt. Mike Raasch said.

A man walking his dogs at about 4 p.m. Nov. 7 found the weapons in a black bag near the fence along a dog-run area at Rincon Valley Community Park. He picked up the black bag after one of his dogs sniffed it out.

The guns were loaded.

The man brought the guns to his neighbor, a sheriff's deputy. The deputy booked the weapons into evidence at the Sheriff's Office, which is investigating the weapons although they were found in the city's jurisdiction.

"The fact that it was close to a high school, that throws up some red flags," Raasch said.

Investigators immediately discovered the .40-caliber weapon had been reported stolen in Cloverdale.

Several weeks later, a man filed a report with the Rohnert Park Public Safety Department and said the .45-caliber handgun had been stolen from his vehicle, Raasch said.

Stolen weapons are often passed from person to person, Raasch said. The ballistics and other forensic tests were uploaded to a state Department of Justice database, but the guns have not been linked to any crime or individual, he said.

Anyone with information about the case can call the Sheriff's Office investigations unit at 565-2185.