Police have arrested the parents of a 1-year-old girl two weeks after her father told a relative she had drowned in a bathtub, according to multiple reports.

Records from Albuquerque's Metropolitan Detention Center show police had David "DJ" Zuber, 26, and Monique Romero, 23, in custody Monday. The pair was identified last week as the parents of three children, including 1-year-old Anastazia Zuber, who was last seen in December.

Police asked for help locating the family after David Zuber’s mother told authorities he claimed on Dec. 18 that Anastazia drowned in a bathtub, according to authorities.

Family members requested on Dec. 18 that a welfare check be done on Anastazia, but Romero told authorities that the infant was with her sister, officials said in a criminal complaint obtained by the Albuquerque Journal. It was not immediately clear why police waited so long to ask for the public's help locating the child.

This undated photo provided by the Albuquerque Police Department shows 1-year-old Anastazia Zuber and her mother, 23-year-old Monique Romero. Authorities asked for help finding Anastazia and her family after police said her father claimed the infant drowned in a bathtub.

Credit: Albuquerque Police Department

icon to expand image

Credit: Albuquerque Police Department

Albuquerque police spokesman Simon Drobik told the Journal that an internal affairs investigation has been launched into the handling of the case.

Investigators found Romero, David Zuber and their two other children at a home in northeast Albuquerque on Friday, KRQE reported.

In a criminal complaint obtained by the news station, police said Anastazia was found that same day “deceased and buried in the backyard where David John Zuber stated she would be located.”

"It's tough for detectives to go out to a location, dig a hole and find a dead baby in a bag," Drobik told the Journal. "Then have to build a case around it — just horrible."

>> Family vanishes after father claims 1-year-old drowned in bathtub

According to KRQE, Romero told investigators "she left Anastazia and her 2-year-old child in the bathtub full of water unsupervised" and that she later found her infant daughter unresponsive. Authorities said neither she nor David Zuber called for police or medical help.

Romero told authorities David Zuber took the body and left their shared apartment after the incident, on Dec. 17, according to the Journal. He told her "it was taken care of" when he returned, the newspaper reported.

Jail records show David Zuber was charged with abandonment or abuse of a child and tampering with evidence while Romero faces one count of child abuse resulting in death.

"It comes down to the two parents who perpetrated this crime and now we have a long investigation to do," Drobik told KOAT.

Authorities continue to investigate.