HONG KONG (AP) — A foreigner living in Hong Kong was arrested on suspicion of killing a Southeast Asian woman at a waterfall in a park on Chinese territory.

The woman, who was about 25 years old, was a domestic helper in Hong Kong but did not work for the suspect, Police Superintendent Sin Kwok-ming told reporters on Tuesday night.

The woman went to the waterfall inside a park in Pok Fu Lam on Hong Kong Island on Sunday night with the suspect, but he ran off alone in a taxi after staying there for about half an hour, police said. .

On Monday morning, residents saw the woman’s body floating in the pond below the waterfall, Sin said.

An initial autopsy showed the woman drowned after being hit in the head with an unspecified hard object. Sin said the woman had injuries to her head and limbs.

The suspect and his wife, a Hong Konger, had gone to mainland China before officers arrested them when they returned to the city on Tuesday, Sin said. The man was arrested on suspicion of murder and his wife was arrested on suspicion of assisting criminals.

The man has a Hong Kong ID, but police did not specify which country he or the victim was from.

“We found so many unreasonable things related to the arrested person. He did not report it to the police and immediately left Hong Kong after the incident. Some evidence related to him had also disappeared,” Sin said.

The investigation continued. The man and his wife were still in custody and had not been charged as of Wednesday morning, police said.

“This case involves a person’s life and we take it very seriously. We will carefully unravel every detail to uncover the truth and bring justice to the deceased,” Sin said.