SEATTLE (AP) — Washington Gov. Chris Gregoire said she spoke to British Columbia Premier Christy Clark and pledged the state's cooperation and help in the investigation of a shooting at the Peace Arch border crossing along Interstate 5.

Gregoire said the shooting "hits especially close to home" and shows how public safety officers put their lives at risk every day.

Washington State Department of Transportation spokeswoman Kris Olsen says Canadian border officials will determine when the crossing will reopen.

She suggests travelers use other border crossings. Crossings on State Route 543 and State Route 9 remained open.

The Peace Arch crossing in Blaine is the third busiest port of entry on the northern border. Last month, it averaged 9,000 U.S.-bound cars a day.