Investigators in Northern California searching for Sherri Papini said Tuesday that despite finding strands of her long blond hair, her earbuds and sifting through surveillance footage, they have made no significant developments towards finding the missing California mother.

Papini’s family members feared the 34-year-old mother of two had been kidnapped after she was last seen jogging on a street by herself while wearing a pink jacket Wednesday, according to local reports. Papini was described as white, 5’4” and 100 pounds with blonde hair and blue eyes.

 "I think we exhausted the resources that we have out here to search for her," Sheila Koester, Papini's sister, told the Redding Record Searchlight. "We are trying to reach out to national news and social media networks ... We feel that it's moved to where she's been taken from this area, and everyone in the nation needs to be looking."

A GOFUNDME campaign to raise money toward search efforts has raised over $30,000 since its inception three days ago.

"The frustrating part is that we feel like we still are going on nothing," said Koester. 

Shasta County Sheriff Tom Bosenko, said detectives were helping local officers sort through the roughly 150 tips that came in since her disappearance. He said no trace of Papini could be spotted when law enforcement combed through surveillance footage from homes and businesses in the area where she had been jogging. Bosenko previously stated that his department was investigating four registered sex offenders in the area about a possible connection to the search, the Ventura County Star reported.

Keith Papini, her husband who reported her missing, told ABC News Sunday that he believed his wife was abducted because she did not pick their children up from day care on the day she disappeared. 

“Knowing that she didn’t pick up our kid… there is no way that ever happens,” Keith Papini said. “Everybody who knows my wife knows that there’s no reason for her to leave… She was definitely taken against her will.”

Papini’s family has offered a $50,000 reward for anyone who might have useful information toward finding her.