The Basque militant group ETA will announce its final dissolution early next month, according to media reports.

During a campaign that lasted nearly half a century, ETA killed more than 850 people in a vain effort to create an independent Basque state in northern Spain and southwestern France. But it declared a ceasefire in 2011 and handed over its arms a year ago.

A local newspaper, Gara, had reported in February that ETA’s leaders would ask its members to vote on whether it should disband completely by the summer.

The group will announce its dissolution during the first weekend of May, the public television station ETB reported on Wednesday night.