Authorities in Mali have arrested four senior employees of a Canadian mining company as the military regime in the West African nation continues to detain workers to pressure companies in its crucial mining sector to pay millions in additional taxes.

Mali has detained senior staff of a Canadian mining firm as it pressures foreign companies to pay additional taxes in its vital mining sector. The arrests highlight the ongoing tension as Mali's government seeks increased revenue,

Barrick Gold (NYSE:GOLD) -0.9% in Tuesday's trading after saying four employees of its Loulo-Gounkoto mining complex in Mali have been charged and detained pending trial, as a dispute over its local mining operations escalates.