By Mei Jingya, Sina English

A court in Kazakhstan on Monday tried the suspect accused of killing 15 people on a China-Kazakhstan border post in May. Vladislav Chelakh pleaded guilty to massacre, local media reported.

Yerzhan Moldagalievm, who was a witness at the hearing on Monday, testified that immediately after the arrest, Vladislav Chelakh, a border guard at the Arkankergen border post in the south of Kazakhstan, said Arkankergen was attacked by the Chinese side.

"He said that we were attacked by the Chinese. When I asked why he thinks so, he couldn't explain it," the witness said.

A total of 14 soldiers and a huntsman were killed at the Arkankergen border post in May, 2012.

A few days after the tragedy, a soldier found Chelakh in shepherd's winter hut.

The witness also stated that Chelakh told him that he returned to the border post, some time after the attack, and found his colleagues dead, doused the place with gasoline and burned it.

"He said he was afraid that he will be charged," Moldagaliev said.

Contact with the Arkankergen temporary border post stopped after the tragedy and border guards were sent there for an investigation. Upon arrival, they found the building of barrack was burned with bodies of 14 victims inside. In addition, a hunter's body was found in the nearby winter hut.

A few days later, the only border guard who survived, the 19-year-old soldier Chelakh was detained. After his arrest, he confessed the murder of fellow soldiers, but later took back his statement, saying that he was psychologically pressurized.

Kazakh presidential adviser Ermuhambet Yertysbayev said Chelakh’s statement against China would have sounded more truthful if he said the border post was attacked by aliens.