Two Chinese citizens, a mother and her son, were found dead on Tuesday night in their home in Dakar, capital of Senegal.
Sun Fengzhi, in her 50s, and her 17-year-old son Wang Kun were apparently murdered, local police told Xinhua.
Police said there were signs of fighting before the two victims died and there was blood on the floor and wall. The apartment was apparently ransacked.
Police are yet to determine the exact time of the crime and what kind of weapons were used.
Wang Peifa, Sun's husband, became nervous during a trip to Spain when he phoned home several times but was not answered. His wife and son were found dead when Wang's friends in Dakar were asked to visit his home to see what happened.
There are currently about 300 Chinese in Senegal, most of them businessmen.
The fate of a Chinese woman, who disappeared in Senegal two years ago, remains unknown.