Alamos' Mexican subsidiary, Minas de Oro Nacional, said five armed thieves subdued its security guards who were loading bars onto a transport aircraft on April 8. A "Cessna-206 type" light aircraft landed nearby, onto which the robbers loaded the stolen gold.
No one was hurt in the heist and the bars were insured. The company did not confirm how much gold was stolen.
Mulatos is a conventional 20,000 tonnes per day openpit, heap-leach operation with gold recovered through a carbon-in-column circuit. Based on reserves at the end of 2019 and current throughput rates, it has an expected mine life of about six years.
Operations at Mulatos are temporarily suspended under a government order to suspend non-essential businesses until April 30 as a measure to contain the propagation of the COVID-19 virus.
Shares in Alamos Gold closed last week at C$8.84, valuing the company at $3.5 million.