Authorities continue to search for missing 11-year-old Colorado boy as more than 130 tips have flowed in to assist them.

Gannon Stauch has been missing since Monday afternoon, Jan. 27, when he left his home to walk to a friend’s Colorado Springs house, according to the El Paso County Sheriff’s Office.

His stepmother was reportedly the last person to see him. She reported him as a runaway and said she has been receiving death threats, according to CBS4. However, Gannon then was considered an endangered missing child.

“It’s so hard to think, ‘Why is this happening to him?’” Gannon’s birth mother, Landen Hiott, said at a press conference. “I have no clue. My kid deserves to come home. My kid has a purpose. My kid has a life.”

The number of tips has steadily grown, with the sheriff’s office announcing Sunday, Feb. 2, it was sifting through 134 to see if they could be of assistance, ABC News reported.

Stauch is about 4-foot-9-inches tall and 90 pounds, with brown hair and brown eyes. He was last seen wearing a blue jacket, blue jeans, and sneakers.

Anyone with information about Gannon is asked to call a tip line at 719-520-6666.