The arrestee, surnamed Ho, faces charges of murder and theft as it is believed he killed the 45-year-old sex worker in a "moment of wrath."

The deceased is a Macau resident and was found in a room of the Pension Florida Hotel on Monday, police said in a press conference today, adding that a 15-centimeter-long wound was also found on the victim's head and her skull suffered damage.

"The hotel room was cleaned after the accident, and no murder weapon was found," the police said.

After an investigation, the police found the deceased had rented the hotel room since February in order to provide sexual services.

When checking security footage, police spotted a man entering the hotel around 9 pm on Friday (March 10).

The video footage further showed the man leaving the hotel room around 30 minutes after he entered, holding a bag and a suitcase which the police believed contained a pillow from the hotel room. He was also seen at different buildings nine times.

Officers arrested the man during a search operation and seized the pillow in the clutter of a building.

According to the police, the arrested admitted that he entered Macau with a legal permit in March of last year but was homeless, and it was believed that he contacted the victim via an online chat group.

The arrestee further claimed he had sex with the deceased before the murder and killed her with a blunt object as she insulted him during intercourse but denied the crime was premeditated.

Police added the arrested did not conduct the crime on "impulse," citing he was in a normal mental state and took away the victim’s phone and tried to evade the police by changing his location.

The arrestee is now detained, and further investigation is ongoing for the murder weapon.