The Mining ministry has raised the alarm over increased smuggling of minerals in the past two months.
Mining secretary Dan Kazungu said most cases involved undocumented exports and imports. Illegal business done through the Mombasa port and other exit channels, he said, hurts the sector and the general investment pipeline.
Mr Kazungu spoke at the port on Friday after a meeting with the facility stakeholders.
The port is said to be the favoured gateway by the traders.