Police on Friday said they had arrested a man on suspicion of murder after the body of a 70-year-old man was found in a Tuen Mun park, with stab wounds to his head and neck.
A passer-by, who was walking through a playground on Hoi Chu Road, made the discovery and called the police at about 9 pm on Thursday.
Paramedics were sent to the scene, where they declared the man dead.
Police later found a man nearby with wounds to both hands. Officers chased him down and, during the pursuit, they drew their guns.