Four men arrested by Ann Arbor police shortly after a brazen mid-afternoon robbery Wednesday at a downtown jewelry store have been released from the Washtenaw County Jail, jail officials said tonight.

Washtenaw County Chief Deputy Assistant Prosecutor Steve Hiller said tonight that no charges have been filed against the men.

Lt. Mark St. Amour, head of the police department's detective division, could not be reached for comment today. Attempts to reach several other Ann Arbor police officials tonight were unsuccessful.

Meanwhile, investigators are still searching for two handguns used in the robbery at Schlanderer & Sons on South Main Street and are enlisting the public's help, according to a "Code RED Alert" issued to some residents this afternoon.

The alert was put out by phone and e-mail to residents who live south of West William Street, north of Pauline Boulevard, west of South Main Street and east of South Seventh Street.

It asks them to keep an eye out for the guns, "expensive watches" that may have been stolen and "suspicious bags" that could have been used to conceal stolen items.

Police are asking residents to look in their yards, the bushes and around trees, the alert says.

Residents who find suspicious items should call 911, the alert says. Anyone with information on the robbery can call the department's tip line at (734) 794-6939.

Lee Higgins covers crime and courts for AnnArbor.com. He can be reached by phone at (734) 623-2527 and e-mail at leehiggins@annarbor.com.