A national labor board says it has found evidence of illegal labor practices at Berkshire Medical center.

iBerkshires.com reports The National Labor Relations Board regional director has alerted the hospital that it has found merit that the facility violated the National Labor Relations Act.

The board assessed three unfair labor practice charges over the course of the past year, including two that the hospital unlawfully threatened to interfere with nurses' benefits prior to their voting for a one-day strike, and failing to provide information on a health insurance program to nurses.

A hospital spokesman says BMC arranged to continue its contributions during the strike and that it told nurses there would be no interruption.

The cases will be assessed by an administrative court judge.