China hopes to 'strengthen cooperation' with Hong Kong police

China's head of public security called for stronger cooperation with Hong Kong's police on Friday, according to state media, as pro-democracy protesters vowed to hold another massive rally over the weekend.

In a meeting with Hong Kong police chief Tang Ping-keung, Chinese public security minister Zhao Kezhi said he hoped to "strengthen cooperation" and "jointly safeguard national security and the social stability of Hong Kong."