The mother of a 10-year-old Washington state girl who vanished over the weekend pleaded for those who might have seen anything out of the ordinary to come forward.

Meanwhile, the search for Lindsey Baum, last seen walking from a friend's house six blocks away from her home in McCleary Friday night, expanded on Tuesday.

Her mother, Melissa Baum, said on FOX News that "if anyone has seen or heard anything — any little thing that they saw and thought, hmm, that's kind of odd," they should call police immediately.

Baum said she's worried her daughter was kidnapped.

"They have informed me that they are expanding the search," she told FOX. "At this point, it's being treated as an abduction."

FBI agents have joined the hunt for Lindsey. Grays Harbor County Undersheriff Rick Scott confirmed Tuesday that the search for the missing girl is widening.

Scott told KXRO that several tips have been received and investigators would like to talk to anyone who may have seen anything suspicious in McCleary, a tiny town of only about 1,500, between the hours of 8:30 p.m. and 10 p.m. Friday when Lindsey failed to return home.

Lindsey has been upset over her parents' ongoing divorce and may have run away.

Baum said the child's father was 3,000 miles away when she disappeared.

Authorities canvassed the city Saturday and Sunday but didn't find any clues, according to Scott.

He said there is no evidence of foul play, but his agency is "beginning to investigate with that possibility in mind."

McCleary Police Chief George Crumb told The Aberdeen Daily World that while his department hoped Lindsey ran off, "she's been gone far too long."

Baum reported her daughter missing about 10 p.m. Friday.

Neighbors and friends say the whole town is on edge.

"I'm starting to think the worst because it has been two days now and it is a small town and somebody would have said something," family friend Melissa McCann said earlier this week.

Dozens of searchers have been combing the area with the help of dogs and a helicopter.

Lindsey is 4 feet 9 inches tall, weighs 80 pounds and has brown hair and brown eyes. She was last seen wearing a light blue hooded pullover shirt and blue jeans.

Anyone with any information is asked to call the Grays Harbor Emergency 911 Center at (360) 533-8765.

Click here for more on this story from Q13FOX.com.

The Associated Press contributed to this report.