SAO PAULO (Reuters) - Metalworkers at Brazilian planemaker Embraer went on strike on Wednesday for an indefinite time, demanding wage increases and the signing of a collective labor agreement, the Metal Workers Union from Sao Jose dos Campos said in a statement.

Embraer did not immediately respond to a request for comment.

According to the union, Fiesp - which is the entity representing the aerospace sector - proposed in negotiations a salary adjustment only based on inflation and a reduction in job stability for injured workers and those with occupational diseases.

That proposal was rejected last week and a strike notice was approved, the union added in a statement on its website.