Published reports indicate that workers at the Sparrows Point steel mill in Baltimore County are being laid off.
Workers tell The Baltimore Sun that managers met with employees on Thursday and told some not to report to work next week.
WMAR-TV posted a memo on its website that it says was sent to union members saying there was not much new information, but workers should file for unemployment compensation if laid off.
Spokesmen for RG Steel, which owns the plant, did not return calls and emails asking for comment. A union official did not return calls.
The mill employs more than 2,000 people. The Sun quoted several workers as saying that Sparrows Point planned to shut down some steelmaking operations as it struggles to pay bills and win back customers.