RIO DE JANEIRO -- Chilean state copper company Codelco has reportedly shut down two mines due to damage from the massive earthquake.

La Tercera says operations were halted at El Teniente and Andina mines. Chile's main port at Valparaiso is also indefinitely shut down.

The newspaper cites an unnamed company official who says the damage is not major and the mines should be back online within hours.

Operations elsewhere in Chile are normal.

Calls to Codelco were not immediately returned.

The 8.8-magnitude quake struck early Saturday about 265 miles (425 kilometers) from El Teniente and 340 miles (550 kilometers) from Andina.

Chile is the world's No. 1 copper-producing nation, and Codelco the biggest copper-producing company.