A Russian man who admitted to beheading an escort after he was unable to perform during a drunken binge is suspecting of being a prostitute serial killer.

Alexei Varakin, 37, admitted to stabbing Vlada Skitskaya, 25, to death in her Moscow high rise after he became enraged due to suffering an “intimate problem,” Russian news outlet NTV reported Monday.

Skitskaya, who was working as a prostitute after moving from a smaller city in search of a better life, reportedly managed to grab his knife and slash the impotent in the face before she was dismembered .

Vorobyova’s body was found beheaded near the crime scene, multiple British tabloids reported, citing the Russian news outlet The Spot.

Under interrogation, Varakin copped to the sadistic murder and also admitted to killing 40-year-old prostitute Olga Vorobyova in the hotel where he had recently been living after she refused to “serve” him beforehand, NTV said.

Varakin had been living in isolation at the hotel after being released from a mental hospital where he was sent in 2010 for stabbing two St. Petersburg prostitutes who caught him stealing from their purses, the outlet noted.

The suspect told authorities he had been under the influence of alcohol while committing the sickening murders.

“During the investigative actions, the man admitted his guilt in full and told the investigation that he drank alcohol and used an insignificant reason for a conflict and the commission of subsequent crimes,” Yulia Ivanova, senior assistant to the head of the Main Investigative Directorate of the Investigative Committee of the Russian Federation for Moscow reportedly said.

Forensic examinations are underway to see if Varakin is be responsible for the deadly slayings of other sex workers.