Gunmen attacked a restaurant in the central Philippine city of Cebu on Wednesday, leaving two Chinese diplomats dead and injuring the consul general.
The attack took place at 1.30 pm (0530 GMT) at a popular Filipino restaurant known as the Lighthouse, police said.
National police spokesman Wilben Mayor said in a text message that the deputy consul and the finance officer for the Chinese consulate in Cebu were killed and the consul general was wounded in the attack.
Song Ronghua, the consul general, was rushed to hospital for treatment following the attack.
Mr Mayor also said that two Chinese nationals, including a woman who worked at consulate, were arrested following the attack.
Police also found a 45 colt pistol from the scene.
According to the manager of the restaurant, Stephen John Patero, attackers targeted a private room which is a favourite for local politicians.
No group has claimed responsibility for the shooting yet.
"We're still trying to determine the motive for the shooting," police spokesman Chief Superintendent Prudencio Banas said.
"We have the suspect, a Chinese woman, but we would need translators to interview her on what really happened."
Filipino and Chinese authorities have been silent on the incident, with Chinese embassy spokesman in Manila Li Lingxiao and Philippine Foreign Ministry spokesman Charles Jose saying they couldn't immediately comment.
"Our embassy is still verifying the facts. We'll update you as soon as I have anything new," Li said in a text message.