Searchers scour Tucson for missing 6-year-old girl

TUCSON, Ariz. (AP) -- Police have cordoned off a block in the Tucson, Ariz., neighborhood where a 6-year-old Arizona girl went missing.

Investigators have fanned out over the area looking for clues in what they're calling a possible kidnapping.

Isabel Mercedes Celis (SEHL'-his) vanished from her home during the night. The first-grader's parents last saw Isabel in her bedroom at 11 p.m. Friday. Police say they discovered her missing at about 8 a.m. Saturday, and phoned 911 minutes later.

Investigators are looking into various scenarios, including the possibility Isabel wandered out of the home she shares with her parents and two brothers.

Both parents attended a morning Mass at St. Joseph's Parish, which is walking distance from their home.  A deacon at the church says the couple appeared "very upset" but were doing "as well as can be expected."