JOHANNESBURG, April 15 (Reuters) – South African police have intercepted 167 rhino horns believed to be destined for Southeast Asia, in one of the biggest such hauls ever in the country.

Two suspects, aged 57 and 61, were arrested with the horns on Saturday, police said on Sunday. They had been tipped off about the suspects’ vehicle.

“The value has not been determined — it’s one of the biggest hauls in the country,” Brigadier Hangwani Mulaudzi, a police spokesman, said by text message on Monday. The case was still being investigated, he said.

Nearly 80 percent of the world’s rhinos live in South Africa. More than 1,000 rhinos were killed in the country each year from 2013 to 2017, according to conservation group Save the Rhino.