The family of a missing Morgan Hill girl has increased the reward for her safe return from $10,000 to $25,000.

The reward, announced this morning, was first announced April 7, nearly a month after Sierra LaMar's disappearance.

It is available to the first person who provides information that leads to LaMar, 15, being returned safe and sound, according to Mark Klaas, founder of the KlaasKids Foundation. The funds do not come from the foundation, which has been helping to organize volunteers searching for LaMar.

LaMar disappeared on her way to school on March 16, and has not been seen since. Investigators are treating her disappearance as an abduction.

Recent donations included $10,000 from an anonymous donor and contributions large and small from the community.

Brian Miller, a volunteer, said he's had people come up to him with a jar full of money and tell him their kids wanted to do something, so they went around their neighborhood and collected funds. 

More than 150 volunteers helped distribute flyers and search new areas Saturday.

Also pitching in this weekend was Team Amber, a group named after a teenager that was kidnapped and murdered in San Diego.

The Santa Clara County Sheriff's Office and volunteers have searched extensively in the area around LaMar's home, from a base at Burnett Elementary School.

“We need the person who's out there who knows something to step up if there is somebody who has that piece of information who can remember something and need step up and contact sheriffs," Miller added. 

A small search team will return to the area Sunday.