(CNN) Colorado authorities are looking for an 11-year-old boy who has been missing for a week after he went to play at a friend's house, the El Paso County Sheriff's Office said.

Gannon Stauch left his Colorado Springs home on January 27, his mother told police, and never came back.

Police and local organizations looking for Gannon have received more than 130 tips on his possible whereabouts, the sheriff's office said in a statement on Facebook on Sunday.

Police said the same day they've focused the search in Lorson Ranch, Gannon's neighborhood.

"We would like to remind those who live in or around the Lorson Ranch area to be mindful of and check areas on your property a child may hide to include yards, window wells, outbuildings and culverts," the office said.

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