Four witnesses were subpoenaed Tuesday by the New Jersey Legislature committee investigating last fall’s closure of local access lanes to the George Washington Bridge in Fort Lee.

Ordered to appear for hearings were Gov. Chris Christie’s spokesperson Michael Drewniak; Port Authority of New York and New Jersey executive director Patrick Foye; Port Authority commissioner William Schuber; and Christina Renna, a former liaison with the Office of Legislative and Intergovernmental Affairs, which is an arm of the governor’s office.