The unionists of the state-run broadcaster KBS on Wednesday pledged to strike, citing an ad hoc parliamentary committee's failure to work out measures to guarantee fair broadcasting and to improve its corporate governance structure.

Following a vote on the issue, the union said they plan to walk off the job at 5 a.m., Thursday, and some 2,500 unionists are expected to take part in the strike.

The union criticized a special committee on fair broadcasting for failing to make any noticeable headway, although the committee is set to disband on Monday. It was launched under the agreement of ruling and opposition parties in March.

The union also said that the rival parties should map out steps for improvement by the end of the month.

There will be some snags in broadcasting once the strike starts, it added. (Yonhap News)