HONG KONG – A woman was sentenced to life imprisonment on Thursday for fatally shooting two of her relatives in public in a rare instance of gun violence in Hong Kong three years ago.

Ada Tsim Sum-kit, 47, has been convicted by a seven-member jury of murdering her one of her aunts and uncles at a park a Quarry Bay on Hong Kong Island on June 26, 2018, the High Court heard.

READ MORE: HK shooting: Woman charged with murder

The two victims were 82 and 62, respectively, at the time. Tsim has also been found guilty of harming another uncle, 72, and aunt, 60, with a gun.

The shooting was sparked by a financial dispute as Tsim was believed to be resentful about her relatives’ handling of her grandmother’s heritage, local media reported.

Her relatives reportedly sold a flat left by her grandmother at Nan Fung Sun Chuen in Quarry Bay after the elderly woman died in 2011. They gave her the share that belonged to her late mother, who died in 2015, media reports said.

ALSO READ: Police hunt gun source after Quarry Bay shooting leaves 2 dead

The shooting has prompted attention to how the suspect obtained the gun in spite of the city’s strict control on firearms.

According to the Firearms and Ammunition Ordinance, anyone who illegally possesses arms and ammunition could face a fine of HK$100,000 and imprisonment for 14 years.