Three "killer dolphins" escaped from Ukrainian Navy in pursuit of mates Tuesday.

RIA Novosti reported that three dolphins had escaped from a Ukrainian naval training base in Sevastopol on the Crimean peninsula Tuesday. The Russian and international news agency also reported that the mammals were possibly in search of suitable mates.

A military source claims these particular dolphins are trained to use special firearms and knives, affixed to their heads and to kill humans.

Yury Plyachenko, a former Soviet naval trainer said this type of thing had happened during dolphin training programs during the 1980s.

"If a male dolphin saw a female dolphin during the mating season, then he would immediately set off after her. But they came back in a week or so," Plyachenko told RIA Novosti.

Last year, RIA Novosti reported that 10 dolphins were being trained by the Ukrainian navy to detect mines and attack enemy swimmers. However, Ukraine's Defense Ministry denied reports of any attack dolphin program.

PBC Frontline alleged that the United States Navy had help from dolphins during the Vietnam War and the Persian Gulf.

"The dolphins would swim slowly, patrolling the area with their sonar, and alert armed trainer guards if they located a swimmer. They are also trained to 'tag' the enemy swimmer with a marker so that Navy personnel can apprehend him," stated in the PBS report.

The U.S. Navy Marine Mammal Program denied that the dolphins were trained to kill.

"The Navy does not now train, nor has it ever trained, its marine mammals to harm or injure humans in any fashion or to carry weapons to destroy ships," according to the government agency's website.