CHINA'S STATE TELEVISION OF FOUR FOREIGN MEN SENTENCED TO DEATH FOR KILLING 13 SAILOR'S ON THE MEKONG RIVER CAUSED ANGER IN CHINA ON FRIDAY, WITH MANY PEOPLE SAYING IT WAS AN UNNECESSARY DISPLAY OF VENGEANCE.

 China's state television of four foreign men sentenced to death for killing 13 sailors on the Mekong River caused anger in China on Friday, with many people saying it was an unnecessary display of vengeance.

The 2011 murder of the Chinese sailors was one of the deadliest assaults on Chinese nationals overseas in moderCHIJn times and prompted the government to send gunboat patrols to the region downstream from its border.

Chief suspect Naw Kham, extradited to China by Lao officials in May, was found guilty of the killings of the sailors last year in the "Golden Triangle" region known for drug smuggling, where the borders of Laos, Myanmar and Thailand meet.

Naw Kham, from Myanmar, and the three others were executed by lethal injection in the Chinese city of Kunming, but not before being paraded live on state television, trussed with ropes and shackled in chains, as police led them from the jail to a bus taking them to the place of execution.

Using two hours to broadcast live the process for these criminals facing the death penalty is a violation of Article 252 of the Criminal Procedure Law of the People's Republic of China," said prominent human rights lawyer Liu Xiaoyuan.

"This provision says that criminals facing the death penalty cannot be put on public display."

The broadcast by China Central Television also violated a law by the Supreme People's Court that a "person's dignity should never be insulted", Liu said.

One of the other three executed men was Thai, one was Lao and the other was stateless, Chinese media said.

China is believed to execute thousands of people annually - the exact number is a state secret - and there is widespread support for the death penalty, though the number of crimes that carry it has been reduced in recent years.

But the parading of the for convicted of the Mekong murders would raise questions for Chinese people about the use of executions, said Nicholas Bequelin, a researcher at Human Rights Watch, a New York-based advocacy group.

"It's predatory, voyeuristic and exploitative and that defeats the very purpose of having a legal system," he said.