KUNMING, Jan. 31 (Xinhua) -- Two drug traffickers have been killed in a shootout with police in southwest China's Yunnan Province during the lunar new year holiday, local police authorities said Tuesday.

The two resisted arrest and exchanged fire with police in Longchuan County of Dehong Prefecture early Saturday morning when entering China from Myanmar driving two sport utility vehicles, the prefecture's public security bureau said in a press release.

They also threw grenades at police officers. One suspect were shot dead at the site and the other were injured and died one day later in hospital, it said.

Two policemen were injured but the injuries were not life-threatening.

A total of 330 kg of heroin, meth and opium and one handgun and 10 bullets were seized in the police operation.