Authorities are referring to a veteran US Border Patrol agent as a "serial killer" after he was arrested and confessed to murdering four female prostitutes.

Juan Davis Ortiz, 35, a US Border Patrol agent for 10 years, was arrested on Saturday in the back of a truck after he fled on foot from Texas state troopers in Laredo, Texas.

According to Webb County District Attorney Isidro R. Alaniz, a manhunt began for Ortiz after a woman told police a man attempted to abduct her and she reported it to them, complete with a detailed description of the man, including his tattoos.

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RT reports:

Police say he confessed to four killings, but declined to reveal details of the attacks. So far, only two victims have been identified: Melissa Ramirez, a 29-year-old woman from Laredo; and Claudia Anne Luera, 42, who was found alive on Highway 255 but later died in hospital. The other two victims are an unidentified man and woman. Authorities say that all of the female victims were prostitutes.

Without revealing details of the killings, police said that the attacker used the same “methods and means” to murder each of his victims. Alaniz noted that the suspect appears to have carefully chosen his prey, targeting certain types. "The suspect was hunting for his victims.

"We do consider this to be a serial killer," Alaniz added.

Authorities said there was little doubt that Ortiz was behind the gruesome acts, with Webb County Sheriff Martin Cuelllar stating that police are in possession of “very strong evidence” implicating Ortiz.

The bodies of the first two victims were discovered in a rural part of Webb County two weeks ago, prompting police to launch a murder investigation. The other two bodies were located following the man’s arrest, with the last victim’s remains having been found north of Laredo, the alleged perpetrator’s last hiding place.

ABC News has more.

He is currently being held on a $2.5 million bond.

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