A Nigerian diplomat was found dead on Thursday at his home in the Sudanese capital, Khartoum, security sources claim.
A report on the incidents said the police have swung into investigation though no details have been provided on how he died.
Officials from the Nigerian Embassy in Khartoum were not immediately available to comment, Reuters claim.
Dubai-based al-Arabiya television identified the diplomat as the consul general and described his death as an “assassination”, while reports on social media suggested the killers used a knife in the attack.
While intermittent violence is common in the country’s warring southern and western regions, violence in the capital is rare.
Sudan’s President Omar al-Bashir has in recent months shaken up the security establishment, replacing the heads of the army and intelligence service in February.
The Nigerian foreign ministry has yet to confirm the shocking incident.