Police received a report at 10:32 Sunday morning from a “bomb hunter” who found an object suspected to be a hand grenade near the Dragon's Back on Mount Collinson.
Police found the World War II-era grenade at the scene and nearby hiking trails has been cordoned off.
Officers from the Explosive Ordnance Disposal Bureau were dispatched to the scene, along with firefighters on standby. The bomb squad successfully conducted a controlled detonation.
No one was injured, and no evacuation was required.
Wartime explosives have been found previously in the southern part of Hong Kong Island.
A British mortar shell was dug up in Shek O last March, and in January last year, a Japanese mortar was found near Hong Kong Parkview estate in Tai Tam.
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