NICOSIA, Cyprus — Police investigators in Cyprus searched a flooded mineshaft and a lake Monday in their investigation of the killings of two women and the disappearance of the 6-year-old daughter of one of the victims.

The bodies of two women were found in the abandoned mineshaft six days apart. The first, discovered April 14, was the mother of the missing child, a 38-year-old Filipino woman, police said.

The second body was found April 20; the victim’s identity has not been confirmed yet, authorities said.

A 35-year-old Cypriot military officer is in custody and faces charges of premeditated murder and kidnapping with intent to commit premeditated murder. A law enforcement official said that during questioning the officer admitted killing the women.

The searches of the mineshaft and the lake were for the missing girl, but investigators had not ruled out there being more possible victims of the man in custody, the official said. The official spoke to The Associated Press on condition of anonymity because he was not authorized to publicly disclose details of the case

The state-run Cyprus News Agency reported that investigators said at a court hearing that the man in custody told investigators he met the second victim online and strangled her after they had sex.

Doros Polycarpou, the executive director of an anti-racism group called KISA that runs an immigrant support center, told The Associated Press that both women were reported to police as missing last year.

Cyprus Police Chief Zacharias Chrysostomou said his department would work to address any shortcomings the case exposes. Chrysostomou called the slayings “unprecedented” for Cyprus, a small Mediterranean island nation, and said the scale of the crimes could be even larger.

The search of the lake is set to continue Tuesday with underwater cameras and robotic equipment, Fire Service Chief Marcos Trangolas said.

The search of the mineshaft will resume once inspectors make sure it is safe for crews to enter, he said.

By: Menelaos Hadjicostis, Associated Press

Chief of Cypriot police Zacharias Chrysostomou, center, walks with Cypriot investigators and police officers at a flooded mineshaft where two female bodies were found, outside of Mitsero village, near the capital Nicosia, Cyprus, Monday, April 22, 2019. Police on the east Mediterranean island nation, along with the help of the fire service, are conducting the search Monday in the wake of last week’s discovery of the bodies in the abandoned mineshaft and the disappearance of the six year-old daughter of one of the victims. (AP Photo/Petros Karadjias)

Chief of Cypriot police Zacharias Chrysostomou, center, walks with Cypriot investigators and police officers at a flooded mineshaft where two female bodies were found, outside of Mitsero village, near the capital Nicosia, Cyprus, Monday, April 22, 2019. Police on the east Mediterranean island nation, along with the help of the fire service, are conducting the search Monday in the wake of last week’s discovery of the bodies in the abandoned mineshaft and the disappearance of the six year-old daughter of one of the victims. (AP Photo/Petros Karadjias)

Investigators on a boat use a camera to search for a body in a lake near Xiliatos, after authorities found two female bodies in a flooded mineshaft, outside of Mitsero village, near capital Nicosia, Cyprus, Monday, April 22, 2019. Police on the east Mediterranean island nation, along with the help of the fire service, are conducting the search Monday in the wake of last week’s discovery of the bodies in the abandoned mineshaft and the disappearance of the six year-old daughter of one of the victims. (AP Photo/Philippos Christou)

Cypriot investigators and police search a flooded mineshaft where two female bodies were found, outside Mister village near the capital Nicosia, Cyprus, Monday, April 22, 2019. Police on the east Mediterranean island nation, along with the help of the fire service, are conducting the search Monday in the wake of last week’s discovery of the bodies in the abandoned mineshaft and the disappearance of the six year-old daughter of one of the victims. (AP Photo/Petros Karadjias)

Cypriot special Rescue Forces loaded a special camera inside a flooded mineshaft where two female bodies were found, outside of Mitsero village near capital Nicosia, Cyprus, Monday, April 22, 2019. Police on the east Mediterranean island nation, along with the help of the fire service, are conducting the search Monday in the wake of last week’s discovery of the bodies in the abandoned mineshaft and the disappearance of the six year-old daughter of one of the victims. (AP Photo/Petros Karadjias)

Cypriot investigators and police officers search a flooded mineshaft where two female bodies were found, outside of Mitsero village, near the capital Nicosia, Cyprus, Monday, April 22, 2019. Police on the east Mediterranean island nation, along with the help of the fire service, are conducting the search Monday in the wake of last week’s discovery of the bodies in the abandoned mineshaft and the disappearance of the six year-old daughter of one of the victims. (AP Photo/Petros Karadjias)

Men stand and watch the investigators by a flooded mineshaft where two female bodies were found, outside of Mister village near capital Nicosia, Cyprus, Monday, April 22, 2019. Police on the east Mediterranean island nation, along with the help of the fire service, are conducting the search Monday in the wake of last week’s discovery of the bodies in the abandoned mineshaft and the disappearance of the six year-old daughter of one of the victims. (AP Photo/Petros Karadjias)