NANNING - Police in South China's Guangxi Zhuang autonomous region have cracked a trans-border drug trafficking case, confiscating 51.78 kg of heroin, local authorities said Friday in a statement.

The police also detained two suspects on Thursday, including a female foreigner who was only identified by her surname Ruan, and a further manhunt for others involved is under way.

Ruan, whose nationality was not clarified in the statement, was caught by police on July 2 in Dongxing city, Guangxi Zhuang autonomous region.

Ruan confessed that she was hired by a foreigner to traffick the heroin into Dongxing and then deliver it to Guangzhou, capital of adjacent Guangdong province, according to the statement.

The police then went to Guangzhou and arrested another trafficker surnamed Liu.

According to Chinese law, people who smuggle, sell, transport or manufacture an amount of heroin greater than 50 grams can be sentenced to 15 years in jail, life imprisonment or even death.