Published: Aug 17, 2010 8:23 PM EDT
Updated: Aug 17, 2010 7:22 PM EDT

SEATTLE (AP) - The North American Aerospace Defense Command said military fighter jets were scambled to respond to an airspace violation near Air Force One in Seattle.

Spokesman John Cornelio says the jets were sent from Portland, Oregon, as President Obama was visiting Seattle after a report that an aircraft violated the restricted airspace. He says the aircraft left the restricted area before the Air National Guard jets arrived, and there was no intercept.

Two loud noises, apparently sonic booms, were felt throughout the Puget Sound area.

Obama was in Seattle on Tuesday to stump for Sen. Patty Murray on a three-day campaign swing for endangered Democrats.

Cornelio says the fighters were from the Guard's 142nd Fighter Wing.

Federal Aviation Administration spokesman Allen Kenitzer in Seattle says the fighters were F-15s. He did not immediately know what type of plane violated the no-fly zone.

Kenmore Air president Todd Banks says the incursion was by a plane that landed at his float plane base on nearby Lake
Washington. A passenger, Laura Joseph of Normandy Park, told The Associated Press she and the pilot were returning from Lake Chelan in eastern Washington and didn't know of the flight restrictions.