EAGLE COUNTY, Colo. (CBS4)– The search for a 3-year-old missing boy continues in Eagle County. Sebastian Castro disappeared last Friday.

(credit: Eagle)

READ MORE: Tri-County Health Investigating After Deer Trail School District Parents Claim Mask Mandate Is Being Ignored

More than 600 people from the community combed the area over the weekend. On Monday, they concentrated on a section of the Eagle River.

An article of clothing was spotted there on Sunday along with the phone he was carrying.

READ MORE: 'Shady... Cronyism' At Denver Parks And Rec Says City Council Member

His family says he responds to children’s songs, animal noise and colorful items. They add he may not be comfortable with adults he does not know.

(credit: Eagle)

Volunteers have been asked to sign up online before helping crews.

MORE NEWS: Colfax Marathon Returns To The Streets After Pandemic

A vigil is planned for Sebastian at 9 p.m. Monday.