How the Mystery of the Missing SAT Tests Unraveled

— -- Students at Loudoun County Schools in Virginia can breathe a sigh of relief.

A missing box of SAT tests, previously thought to have been lost in the mail, was located this morning in the shipping room of Broad Run High School in Ashburn, Virginia, where they were administered on May 2, according to a Loudoun County Schools official.

The sealed box was found with the help of the school’s surveillance cameras, which showed the box being wheeled into the room on a cart, Wayde Byard, a Loudoun County Schools spokesman, told ABC News today.

“An Educational Testing Service representative was present when the box was found, before examining it and taking it back to their New Jersey office,” Byard said.

There were 253 SAT tests in the box, officials said. Students had said they were told last week they’d have to make up the test on their first weekend of summer vacation.

"It's a relief that I don't have to deal with SAT prep and finals at the same time now that they found them," said Chris Unger, a junior. "I'm still nervous to see how I scored even though I walked out of there feeling confident."

The College Board said it plans to score the tests and distribute the results as soon as possible. The scores originally were supposed to be released on May 21.

Loudoun County Schools plans to review test-taking procedures with the schools in its district, including Broad Run High School, to make sure this “anomaly” doesn’t happen again, officials said.