LONDON (AP) -- The partner of the grandmother of a missing British schoolgirl was charged Saturday with the 12-year-old's murder, police said.
The charge came as police apologized to Tia Sharp's mother after they failed to find the girl's body in her grandmother's house the first three times they searched it.
Scotland Yard blamed "human error" and apologized for "the distress and concern" caused by the delay in finding Sharp's body, which was discovered Friday in the house – her last known whereabouts – one week after she disappeared in south London.
Stuart Hazell, the 37-year-old partner of Tia's grandmother Christine Sharp, has been charged with murder and will appear in court on Monday.
See Photos From The Investigation (story continues below) :
Tia Sharp, 12, was last seen alive on August 3. Her body was found in the home of her grandmother, Christine Sharp, on August 10. Investigators believe that she was murdered.
Stuart Hazell, 37, has been charged in the murder of 12-year-old Tia Sharp. Hazell is the partner of Tia Sharp's grandmother, Christine Sharp.
Tributes For Tia Sharp
Tributes are left for missing 12-year old school girl Tia Sharp, seen in photo on wall, placed near to the home of her grandmother Christine Sharp, after police found a body in the grandmother's house in New Addington near Croydon, south England, Friday Aug. 10 2012. (AP Photo / Lewis Whyld, PA)
Forensic police officers leave the home of Christine Sharp, grandmother of missing 12-year old school girl Tia Sharp, after they sealed off the area around the home in New Addington near Croydon, south England, Friday Aug. 10 2012. (AP Photo / Lewis Whyld, PA)
Police have erected a tent outside the home of Christine Sharp, grandmother of missing 12-year old school girl Tia Sharp, after they found a body at the home in New Addington near Croydon, south England, Friday Aug. 10, 2012. (AP Photo / Lewis Whyld, PA)
Police secure the area near a tent erected by police outside the home of Christine Sharp, grandmother of missing 12-year old school girl Tia Sharp, after they found a body at the home in New Addington near Croydon, south England, Friday Aug. 10 2012. (AP Photo / Lewis Whyld, PA)
Two others, a 46-year-old woman arrested on suspicion of murder and a 39-year-old man suspected of "assisting an offender," have been bailed to return to a London police station, they said.
Neither suspect was identified by name in line with British practice, and police did not disclose what relationship, if any, the suspects had with the victim. The Press Association and the BBC said the woman was Christina Sharp, and the man was a neighbor.
It is not yet known how the schoolgirl died, and a post-mortem examination is expected to take place Sunday.
FROM HUFFPOST: View A Timeline Of The Case
The discovery of Tia Sharp's body led to anger and disbelief in Britain. The family's frantic search and appeals had even managed to displace much of the feel-good Olympic coverage from the front pages of the nation's tabloids, with at one point The Sun offering 25,000 pounds (nearly $40,000) for the tip that led to the girl's safe return.
The Daily Mirror newspaper asked its readers "WHY DID IT TAKE COPS 8 DAYS?" with the figure 8 outlined in red. The Daily Mail was even more critical, writing under a bold-faced "SHAMBLES" headline: "Despite a week-long hunt by 100 police with dogs, Tia is found dead in her granny's house, which officers had searched THREE times."
Police have not specified exactly where in the house the body was found, but Scotland Yard Commander Neil Basu said Friday they had been juggling several different leads with detectives sifting through 60 sightings of the missing girl, 300 calls, and 800 hours of surveillance footage.
Associated Press writer Cassandra Vinograd contributed to this report.