Isabel Celis disappearance: 911 calls released by Arizona police

Isabel Celis, the 6-year-old who was abducted from her bedroom in Tuscon, Arizona last month, is still missing, as police released the 911 calls made by her parents on the day of her disappearance, MSNBC and Tuscon NBC Affiliate KVOA reported. 

“I need to report a missing child. I believe she was abducted from my house,” Sergio Celis, who discovered his daughter had dissapeared on April 21, said in his call to police, which was released on Monday, CNN reported. Asked why he believes she was abducted, however, he responded, “I have no idea.”

The second 911 call was placed by Isabel's mother, Rebecca, according to MSNBC. 

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"I went to work this morning at seven and um, I just, and I didn't even come and check on her, I should have come and checked on her," Ms. Celis told the dispatcher. "I looked everywhere. […] Somebody took the window out of our house." 

The dispatcher asked if she remembered anything about what her daughter looked like that day.

"Her hair is in braids. It's in little ponytails," Ms. Celis said. "I made little ponytails on her head last night before she went to bed." 

Tuscon Police Chief Roberto Villasenor told ABC News that he has 12 to 15 detectives assigned to investigate the possibility of a stranger abduction, and four detectives looking into the family's involvement in Isabel's disappearance. 

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Earlier Monday, Child Protective Services instructed Sergio Celis to stay away from his two young sons, who were placed in the custody of their mother, New York Daily News reported. It was unclear why the decision was made, ABC News reported. 

Isabel’s parents have both denied having any involvement in her disappearance, according to CNN. 

Police have searched the family’s neighborhood, a nearby landfill, and waterways and drainage systems in Tucson, according to ABC News. They have received over 1,000 tips regarding the 6-year-old’s disappearance, but have still not tracked her down.