The Hong Kong police on Tuesday offered an 800,000-Hong Kong-dollar reward – about 102,000 U.S. dollars – for information about a murder in Sheung Shui area.

On November 13, a 70-year-old man passed by the North District Town Hall as protests were taking place. An unknown person threw a hard object, hitting the man's head. He was confirmed dead the next day.

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Treating the incident as a murder case, the police are asking anyone who has information, photos or videos related to the crime, or information about the identity or whereabouts of the suspect, to contact regional police. 

The man, who worked for Hong Kong's Food and Environmental Hygiene Department, is the first non-protester killed amid months of unrest in Hong Kong. 

Violence has escalated in the Asian financial hub as radical protesters have resorted to more and more deadly weapons, hurling knives, bricks, hammers, metal poles, petrol bombs and firing slingshots at the police.

One policeman was slashed in the neck with a knife in October.

The police also said two home-made bombs found Monday afternoon at the private boys' school Wah Yan College have been safely disposed of by detonation. Officials said the bombs, containing 10 kilograms of explosives, were "complete, fully functional and ready to be used."

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