Massena, NY, Apr 02, 2012 — Smelting operations at both the Alcoa East and West plants are continuing as usual Monday, and an investigation into the cause of a fire in the casthouse of the West plant last week is underway.

A preliminary survey of the casthouse Friday found areas that are structurally safe. That allowed state fire investigators to get to work in the building.

Alcoa spokeswoman Laurie Marr said it's too soon to determine the extent of the damages, or the long-term impact on the plant's operations.