Three Kenyan officers were in custody Thursday over the disappearance of a self-confessed serial killer described as a “bloodthirsty vampire”, barely three months after his arrest, a senior police official said.

Masten Milimo Wanjala was arrested on July 14 over the disappearance of two children but in a chilling confession, admitted to killing at least 10 others over a five-year period.

“Wanjala single-handedly massacred his victims in the most callous manner, sometimes through sucking blood from their veins before executing them,” the Directorate of Criminal Investigations (DCI) said at the time, describing him as a “blood-thirsty vampire”.

READ ALSO: Insecurity: NASFAT Women Advocate Peace, Urge Women Inclusion In Solution To Violence

The 20-year-old was due for a court appearance Wednesday over the cold-blooded murders which targeted 12- and 13-year-old children when officers noticed he had disappeared during the morning roll call.

Three officers who were on duty at the Nairobi police station where he was held have since been arrested, said the regional police commander Augustine Nthumbi.

“They are with the director of public prosecutions,” Nthumbi told AFP, adding that the search for Wanjala was ongoing.

Police had in July described Wanjala’s arrest as a major breakthrough in an investigation into a spate of disturbing child disappearances in the East African country.

His victims were drugged and drained of their blood and some of them strangled, police said.

According to police, Wanjala’s first victim was a 12-year-old girl he kidnapped five years ago in Machakos county east of Nairobi.

The murder of his next victim in western Kenya sparked protests, with locals torching the house of the person they suspected killed the boy.

“Unbeknownst to some of the worried families, their children were long executed by the beast and their remains dumped in thickets. Others were submerged in sewer lines in the city and left to rot away,” the DCI said in July.

The bodies of several children feared to have died at Wanjala’s hands have yet to be found.

Wanjala was unapologetic over his actions and told detectives he derived “a lot (of) pleasure” from killing his victims. (AFP/The Guardian)