BIRMINGHAM Ala. (Reuters) - A U.S. judge on Monday ruled unconstitutional an Alabama law that threatened to close three of the state's five abortion clinics.

The law, which required doctors who perform abortions to have privileges to admit patients to a nearby hospital, would place an undue burden on women seeking the procedure, U.S. District Judge Myron Thompson ruled.

(Reporting by Verna Gates; Writing by Colleen Jenkins; Editing by Doina Chiacu)