Ghana President Nana Akufo-Addo said China may be engaging in unauthorized mining of gold and other mineral resources in the West African country.
The government of Ghana will conduct a systematic and detailed investigation into the matter, Akufo-Addo said during an interview with Nikkei in Tokyo.
Chinese state companies are active in Ghana, developing roads, railways and the power sector.
"Ghana and China have a strong relationship," Akufo-Addo said. "However, we have a big problem in Chinese involvement in illegal mining activity in Ghana ... [and] we have decided to do something about it."
In June 2013, 124 Chinese nationals were detained in Ghana for illegally mining gold. Unlawful mining of mineral resources continues and is gravely affecting Ghana's economy, the president said.