'Sky News has obtained chilling new evidence of mobile execution buses being used by the Chinese government.
It comes less than two years before China hosts the next Olympics - an event it was given after promising to improve its human rights record.
China's penal system is surrounded by a wall of secrecy, but an investigation by Sky's China correspondent Dominic Waghorn found between 3,500 and 10,000 people are put to death each year.'
