About 60 people in Morton Thiokol's testing division will lose their jobs before the end of February following the completion of tests on redesigned space shuttle booster rockets, a company spokesman says.

Rocky Raab said the layoffs were announced in a memo posted Saturday to alleviate rumors about layoffs that have been circulating throughout the company.When the final full-scale qualification test-firing of Thiokol's redesigned space shuttle booster rocket is completed, Raab said the corporation's testing division in its plant west of Brigham City will have about 120 employees it doesn't need.

He said Thiokol will be able to place only about half those employees in other positions within its operation.