Laos

Officers intercepted a truck carrying 55 million methamphetamine tablets and more than 1.5 tonnes of crystal meth, the UN's crime agency said.

The discovery came after police stopped a truck carrying beer crates in Bokeo, which borders Thailand and Myanmar.

The area - known as the Golden Triangle - has a long history of being a major drug-producing hotspot.

Jeremy Douglas, Southeast Asia regional representative for the United Nations Office on Drugs and Crime (UNODC), told the BBC it was "by far the largest seizure in the history of East and Southeast Asia".

Authorities found a nitrogen tank containing the vials in the man's bag when he was crossing the border at the northern Thai town of Nong Khai.

Police said the man confessed that the semen was bound for a fertility clinic in the capital of Laos - Vientiane.

Laos has seen a boom in commercial surrogacy after neighbouring Thailand and Cambodia banned the practice.

The semen was collected from Chinese and Vietnamese men, police said.