DULUTH, Ga. -- "We have nothing. It's very frustrating."

That's what Duluth, Ga., Police Chief Randy Belcher told reporters Thursday morning about the search for a Georgia woman who vanished just a few days before she was to be married. He said the case is now being handled as a criminal investigation.

Belcher said that the publicity about the search for Jennifer Wilbanks has generated a number of reported sightings, but no real leads in the case. At another news conference earlier Thursday, Maj. Don Woodruff said that Wilbanks' family said it's "totally uncharacteristic of her behavior" to be out of touch so long.

A cadre of volunteers helped search Wednesday for Wilbanks, 32, who disappeared Tuesday night after going out for an evening jog. The search was primarily along the banks of the Chattahoochee River near Atlanta.

---

Video: Search Widens For Missing Bride-To-Be

---

Belcher said Wilbanks is a marathon runner who didn't have a particular route she followed when she ran. So, he said the search area is widening -- and additional dogs are being brought in to try to pick up a scent.

He said Thursday's search would rely on about 100 police officers from Duluth and surrounding agencies, without volunteers.

Wilbanks was last seen in the downtown Duluth area at 8:30 p.m. Tuesday after leaving the house she shares with her fiance, police said. The couple was set to be married this weekend.

She was last seen wearing a gray sweat shirt and blue sweat pants. She stands 5 feet 8 inches tall and weighs about 120 pounds, police said. She has brown hair and brown eyes.

Anyone with information was asked to call Duluth police at (770) 476-4151.

John Mason, the woman's fiance, said he called police after she failed to return home, and he and other relatives were unable to find her.

"She left out of here with a radio and just the clothes she had on," Mason said, adding that he doesn't believe his prospective bride was suffering from last-minute pre-wedding jitters. "If it's cold feet, it's the worst case of cold feet I've seen."

Mason said his fiance left her pocket book, diamond ring, credit cards, car keys and cell phone behind when she went to jog. The wedding had been scheduled for Saturday.

Joyce Parrish, the woman's mother, said she was excited as the wedding day neared. Parrish said her daughter was putting the final touches on her wedding plans. She said they talked just a few hours before she disappeared.

Volunteers, who numbered in the hundreds, handed out fliers to motorists Wednesday that sought help from anyone who might have information about the woman's disappearance.