KUNMING - Police in Kunming in Southwest China's Yunnan province have 13 suspected members of a drug ring in custody, they announced on Monday.

A total of 56.4 kilograms of methamphetamine and about 290 grams of heroin were seized at the time of the arrests, police said.

In March 2015, police in Wuhan city in the central province of Hubei became suspicious when a man, with the surname He, traveled across the China-Myanmar border a number of times.

They detained He on March 29, his arrest led to the discovery of a cross-border drug syndicate that was distributing drugs across the provinces of Hunan, Hubei, and Sichuan.

As of Dec. 2015, 13 members had been detained in Yunnan and Hunan, including two of the alleged leaders, identified by the surnames Lu and Huang.

The investigation continues.