Petrobras says strike cut oil output by 8.5 percent on Tuesday

BRASILIA (Reuters) - A four-day strike reduced oil production at state-run oil company Petroleo Brasileiro SA by 8.5 percent or 178,000 barrels on Tuesday, the company said in a Wednesday securities filing.

Petrobras estimates that Wednesday's output will be 6.5 percent or 140,00 barrels lower than pre-strike levels due to the walkout that began on Sunday and threatens to become its most disruptive labor stoppage in 20 years.

(Reporting by Anthony Boadle; Editing by Ken Wills)