PORTLAND, Ore. (AP) - Portland State coach Nigel Burton has dismissed defensive coordinator Eric Jackson effective immediately.

The Vikings opened with a victory over lower-division Carroll College but fell 45-37 at North Dakota last weekend.

Jackson joined Burton's staff when he was named head coach in 2010. Before coming to the Vikings, he was secondary-special teams coordinator at Princeton for nine years.

Burton says he will begin the search for a replacement immediately.

Portland State travels to Washington to face the Huskies on Saturday.