WICHITA, Kan. (AP) — Wichita police are searching for a 4-month-old boy who was last seen three weeks ago with his father.

Police say the boy’s mother reported him missing Thursday. She told police the boy and a 2-year-old child were with their father for visitation beginning June 5. She said the father did not return the children and took them to Texas before returning to Wichita.

Police Capt. Jeff Weible says younger boy, Vincent Moore, was last seen July 11 when the father left their home with him, carrying a blue floral-print diaper bag.

The father was arrested Wednesday on unrelated warrants. The 2-year-old was with him but Vincent was not. Weible says police have been told different stories about the child’s whereabouts and they have all been false.