Two men transporting 31 rhino horn worth an estimated one million dollars have been arrested by police in Vietnam.
Police say the suspects, both aged 32, were caught with 37 kilogrammes of horn in three bags at a railway station.
Demand for the horn of the endangered species among Vietnam's wealthy elite has been partly blamed by conservation groups for a spike in rhino killings that reached a record 1-thousand 215 in 2014, 10 times the number killed in 2009.
Folk superstitions in Vietnam esteem rhino horn as a medicine, aphrodisiac and status symbol.
Over the weekend, the South African government said that poaching of rhinos had increased by 18% in the first four months of this year, compared to the same period last year.