SALT LAKE CITY (AP) — Hundreds of volunteers searched rugged hills and city neighborhoods Thursday for a 14-year-old girl police say was taken at gunpoint in her pajamas from her million-dollar home.

Despite more than 1,000 tips, police said they had made little headway in the baffling disappearance of Elizabeth Smart.

The reward for her safe return was raised to $250,000.

Early Wednesday, an intruder forced open a window at Elizabeth's home and went into the bedroom where the teen-ager and her 9-year-old sister slept, police said. The rest of the family was also asleep. Police said the gunman warned the younger girl her sister would be harmed if she told anyone.

A family member said the Smarts have a security system in the home designed to alert them to an intruder, but it doesn't have a loud alarm and doesn't ring into a security agency.

No ransom demand had been made as of Thursday, police said.

"We're not in a position where we can conclude whether this was a random or targeted victim," Police Chief Rick Dinse said.

About 1,200 volunteers in groups of 10 to 20 fanned out through the streets and into the steep foothills around the city in response to a desperate plea from the girl's father.

Searchers knocked on doors and asked if anyone had seen anything suspicious. Others hiked through a city cemetery above the town, and combed the juniper and holly bushes in a park.

"None of the information we have gotten has turned up anything significant," police Capt. Scott Atkinson said at an afternoon news conference. "The further we go into this, the more concerned we become. Leads dry up, those kinds of things."

As for suspects, Dinse said, "Nobody's been eliminated," including family members. But he said they have been extremely cooperative.

The reward was initially $10,000, but donations from the community boosted the fund.

Elizabeth's parents went on national TV to renew their plea for their daughter's return.

"This person, whoever he is, I don't think he knows what he's doing," Elizabeth's father, Edward, said on NBC's "Today" show. "She's just the sweetheart in our family and we just want her back."

Smart, a real estate and mortgage broker, and his wife, Lois, have lived in their seven-bedroom house since 1996. The couple have four boys and two girls. Elizabeth was described by friends and family as a sweet and shy teen-ager, an accomplished harp player and a good athlete. She is to graduate from middle school on Friday.

Elizabeth's maternal grandfather died last week, and she played the harp at his funeral Monday, choosing "Silent Night" because Christmas was his favorite time of year.

Family said her mother, Lois, is devastated. She appeared on the "Today" show Thursday morning, uttered a few words and fell apart.

"She didn't even have time to mourn her father. She has a broken heart. She cries 24 hours a day," said her brother Mark Francom. "She said to me, 'Why would he pick my home?' "

The family's house is on the market for $1.19 million, and police were looking into whether a potential buyer toured the home and later returned.

Investigators were also trying to determine whether any neighbors had surveillance cameras that might yield clues. Officers also searched the family's computer to see if Elizabeth had had contact with any strangers online, though her father said she did not use the Internet.