PORTLAND, Ore. — Grocery workers from across Oregon and southwest Washington have voted to approve a strike if negotiations with four of the region's largest supermarket chains deadlock.

Oregon Public Broadcasting reported Monday that the union representing more than 20,000 regional grocery workers has been pushing Albertsons, Fred Meyer, QFC and Safeway to increase workers' wages.

Jeffery Temple, spokesman for Fred Meyer Stores, said the company is offering larger wage increases than those approved in the last two contracts.

He said it's also offering a pension and benefits package that allows most employees to pay $30 a month or less for health care.

The union said to avoid a strike its members will need to see an offer of a "notable" wage increase on the table.

Both sides meet again on Thursday.

Information from: KOPB-FM