Beijing invoked diplomatic immunity for its consulate staff in Cebu City in the Philippines who were involved in Wednesday's fatal shooting, local officials said. At least one of the two suspects is also a Chinese diplomat. Consul general Song Ronghua, who was shot in the neck, remained in stable condition yesterday. The two diplomats killed in the attack were the consulate's No 2, Sun Shan, and finance officer Li Hui. An investigator told the South China Morning Post that another, unidentified consular officer was hit by a ricocheting bullet and wounded slightly near the spine. She went to hospital but was released after receiving a tetanus shot. Guo Jing, a visa section consul, and her husband, Li Qingliang, were taken into custody. A senior government official in Manila said the Chinese government had invoked diplomatic immunity. The official, who asked not to be named, said full diplomatic immunity meant "they are immune from arrest, prosecution and detention, under the Vienna Convention". China and the Philippines had also agreed in 2009 to a deal that "broadened the Vienna Convention and granted full immunity even to consular officials of both countries", the source said. The shooting happened soon after nine people from the consulate in Cebu finished lunch in the main dining room celebrating the birthday of new consul general Song on Wednesday, according to an investigator, who spoke on condition of anonymity as the person wasn't authorised to speak publicly on the matter. None of the survivors had agreed to be questioned by the police and the two bodies had not been sent for autopsy because no consent had been given by close kin, the source said. There was no CCTV inside the main dining area, the investigator stressed. Surveillance outside the main dining room recorded a woman running, being shot from behind and falling face down on the floor. Only a portion of a hand holding the gun is visible in the footage. The investigator said a frame-by-frame analysis showed the triggerman was male. The police believe Li was the gunman. Philippines foreign affairs spokesman Charles Jose said in a statement that "the shooting was an extreme act of a relative of a staff of the consulate general". We are deeply saddened about the incident … and we are still investigating the reasons and situation behind it Foreign ministry spokeswoman Hua Chunying At a regular press briefing in Beijing, foreign ministry spokeswoman Hua Chunying confirmed that two Chinese diplomats had been killed and another injured in a shooting in Cebu. "We are deeply saddened about the incident … and we are still investigating the reasons and situation behind it," Hua said. Professor Niu Zhongjun, of the China Foreign Affairs University, said diplomats formally dispatched by the foreign ministry would be entitled to immunity, regardless of their official position."The immunity is a form of respect from the receiving country," Niu said. In July, 1982, Tang Jiansheng, a translator at the Chinese embassy in Maputo, Mozambique, killed nine staff with a gun within the embassy compound. He was deported to China and executed.