Drug maker Pfizer continues to cut jobs as part of an ongoing restructuring plan that began last fall after the company's acquisition of Wyeth.

This week, the company filed a notice with the state Department of Commerce saying it has laid off at least 50 workers at the company's Morrisville facility.

Rick Chambers, a company spokesman, said the cuts are part of the 170 researchers in Sanford and Morrisville that the company announced it would be laying off last fall as part of a larger streamlining of its research operations.

Those job cuts are expected to be completed by the end of the year, Chambers said.