A miner at a Mexican gold and silver mine, San Dimas Mine, died in an accident this weekend, Toronto-based Primero Mining Corp. said Monday.

The accident was an isolated incident that occurred during underground mining operations. The company is working with local authorities which have commenced an investigation into the accident while normal operations at the mine continue, Primero said in a statement.

The company did not release the name of the victim.

Shares of Primero Mining, which is the sole owner of San Dimas, were down 1.3 percent in midday trading.

Primero Mining was formerly Mala Noche Resources Corp.