Namibia is investigating the deaths of at least five crocodiles in the Kunene – the river that flows between it and Angola.
Reports from people on the Namibian bank say the reptiles appear to have been poisoned, then cut open, with their limbs removed.
Namibia has laws against the killing of crocodiles, which are a tourist attraction.
Romeo Muyunda, chief public relations officer for Namibia’s Ministry of Environment, told BBC Focus on Africa radio it was suspected the crocodiles were poisoned on the Angolan side.
A meeting has been set up with the ministry’s Angolan counterparts at the end of August to discuss the killings, he said.
Namibian authorities suspect people on the bank could have killed the crocodiles in retaliation to an attack, Mr Muyunda said.
Investigators will also explore whether the crocodiles were killed for their meat.
