ANCHORAGE (AP) — Authorities on Wednesday were investigating threaten- ing phone calls to at least eight schools in Alaska in the past 10 days that prompt- ed brief campus lockdowns

and students being kept in classes.

However, none of the calls resulted in attacks or violence.

The calls began on April 27 and targeted schools

in Fairbanks, Juneau, Anchorage, Kenai and other communities. One call was received by an elementary school at Fort Wainwright.

Juneau-Douglas High School was called on two

days, including Tuesday. A voice that sounded automat- ed or scrambled was heard on one call saying there was a gunman on campus and many casualties, police said.