Malaysia has made a record seizure of 50 rhino horns worth an estimated $12 million at Kuala Lumpur airport as they were being flown to Vietnam, authorities said Monday.

Customs officials found the parts in cardboard boxes on August 13 in the cargo terminal of the capital’s airport, said Abdul Kadir Abu Hashim, head of Malaysia’s wildlife department.

The 50 rhino horns weighed 116 kilogrammes (256 pounds) and are worth about 50 million ringgit ($12 million), he told AFP, adding that the seizure was “the biggest ever in (Malaysia’s) history in terms of the number of horns and value”.

(read more: The Jakarta Post)