WEST MIFFLIN — General Motors has closed a local metal stamping plant, leaving several hundred people jobless.

The West Mifflin plant was one of 11 plants targeted for closure by September 2007, but it remained open as GM tried to find a buyer. A potential sale fell through in April.

GM spokesman Chris Lee said the plant produced its last part on Nov. 20 and finished processing work Friday.

About 350 maintenance and production people worked at the plant.

A handful of skilled craftspeople will remain until mid-January, when GM will auction the plant's equipment.

The plant had been in operation for 58 years and employed 3,000 people at its peak in the 1950s.

Most recently, it made fenders, doors and hoods for the Chevy Cobalt.