KUNMING, Oct. 11 (Xinhua) -- Police in southwest China's Yunnan Province apprehended six suspects for drug trafficking and seized 122.97 kg of drugs, local police said Thursday.

The police in Huaning County received a tip-off in June. In mid-August, police seized 38.92 kg of methamphetamine from a truck in the city of Neijiang, Sichuan Province, and 32.46 kg of methamphetamine from another truck in Longxi County in northwest China's Gansu Province.

On September 24, police apprehended three suspects and seized 37.8 kg of methamphetamine in the city of Jingzhou, Hubei Province. Three other suspects with 13.79 kg of heroin were seized by another group of police in the city of Luohe, Henan Province on the same day.

The six suspects have been detained and further investigation is underway.

Drug trafficking is a challenging problem in Yunnan, as it borders the Golden Triangle known for drug production and trafficking.