This undated photo provided by the Tucson Police Dept. shows Isabel Mercedes Celis. Tucson police are searching for a 6-year-old girl who went missing from her home on the city's east side. Isabel Mercedes Celis was last seen late Friday and discovered to be missing at about 8 a.m. Saturday, April 21, 2012. (AP Photo/Tucson Police Dept.)
TUCSON, Ariz. (AP) -- The family of a missing 6-year-old Arizona girl says they will "never give up" trying to find their daughter.
Isabel Celis' family released a statement Monday with their first comments since she disappeared from her Tucson home two days ago.
They say they appreciate everyone's interest in finding Isabel and thank all the volunteers who have been searching for her.
The family says they are fully cooperating with authorities and are focused solely on her safe return.
FBI dogs went through the Celises' home Monday and turned up information that required a follow-up, but authorities wouldn't elaborate.
Lt. Fabian Pacheco, a Tucson police spokesman, says officials will continue devoting resources to the search for Isabel through the night.