DURHAM -- A drug maker says it laid off 22 more employees at its North Carolina research facility following an earlier summer dismissal of scientific workers. The Herald-Sun of Durham reported Tuesday that GlaxoSmithKline said the layoffs of chemists occurred last week at its Medicinal Chemistry and Oncology Department in Research Triangle Park. The company laid off about 100 workers in its research department in June and two weeks ago laid off 90 people at its manufacturing plant in Zebulon, a Raleigh suburb. The company said in June it was cutting 350 jobs around the world in its research staff. Information from: The Herald-Sun, http://www.herald-sun.com (Copyright 2008 by The Associated Press. All Rights Reserved.)