Police on Saturday night were investigating a stabbing in north Modesto that left one man seriously injured. The man was taken by ambulance to a local hospital, and his condition was not available. The injured man was found shortly before 7:30 p.m. in a parking lot behind the Rogers Jewelry Co. store in the 3600 block of Sisk Road, just south of Vintage Drive. Modesto police Sgt. Craig Gundlach said people driving near the area spotted someone on the ground. They approached the injured man and discovered he had multiple stab wounds. Gundlach said he was not breathing. Police were trying to determine where the stabbing occurred. The parking lot was mostly empty, except for some passers-by who were talking to officers. Officers did not have any further information. Police ask anyone with information about this stabbing to call Crime Stoppers at 521-4636. Tipsters also can e-mail tips through the Crime Stoppers Web site, www.stancrimetips.org, or text tips to CRIMES (274637) by typing "Tip704" plus a message. Callers to Crime Stoppers can remain anonymous and are eligible for a cash reward.