(Cottage Grove, OR) -- It was a tense Monday morning for students and staff at Cottage Grove High School. Lane County Sheriff's deputies say the school went into lock down after police responded to reports of a student entering the building with a gun. Law enforcement officers from several agencies assisted, as Cottage Grove Police worked to clear the building. Sixteen minutes later, police gave the all clear and the lockdown was lifted. School officials said there was no student with a gun. They say police determined that the item mistaken for a gun was in fact, a canned beverage.