Alcoa, which operates a large aluminum plant in Massena, says it is reviewing its operations and could close more plants.

The company said in a statement published Friday that it is looking at “500,000 metric tons of smelting capacity and 2.8 million metric tons of refining capacity for possible curtailment or divestiture.”

They say 14 percent of Alcoa’s global smelting capacity and 16 percent of its global refining capacity could be affected.

The company says outcomes could include “partial to full plant curtailments, permanent shutdowns or divestitures.”

“Alcoa continues to take decisive action, transforming its upstream portfolio to create a lower cost, globally competitive commodity business,” said Alcoa President Bob Wilt in a press release. “Our goal is to move down the global aluminum cost curve to the 38th percentile and the global alumina cost curve to the 21st percentile by 2016. The results from this review will help achieve those goals. We’ll take action only after a thorough strategic review to determine the best outcome for our shareholders and in consultation with our stakeholders.”

Alcoa recently closed one of its two Massena plants. The so-called east plant, a former Reynolds Metals facility, was shut down in April 2014. Close to 300 jobs were affected by the closure. The remaining Massena plant employs more than 700 people.

In its primary metals business, the Alcoa has curtailed, closed or sold 1.3 million metric tons, or 31 percent, of its highest cost global smelting capacity since 2007, the release said.