Millions in gold stolen from Mexico mine

Armed robbers have made off with nearly 200kg of gold worth $US8.5 million ($A11.1 million) at current prices from Canadian firm McEwen Mining's mine in Sinaloa, Mexico, the company says.

"The crime is being vigorously investigated by the Mexican authorities," McEwen Mining said in a statement late on Tuesday.

The loot - gold-bearing concentrate - weighed about 900kg, and contained close to 200kg of gold.

The Toronto-based company added that its insurance would cover part of the loss from its El Gallo 1 mine, but not all of it.

McEwen Mining is led by Rob McEwen who previously steered Vancouver's Goldcorp to become the world's fourth-largest gold-miner.