3 BERLIN POWERS ACT ON TERRORISM
Responding to the bombing of a West Berlin discotheque a week ago, the three Western powers responsible for security in that city announced today that they were taking measures to check ''international terrorism'' and eject persons ''posing a threat to the population of Berlin.'' A statement issued in the name of the United States, Britain and France said the measures were ''exceptional and provisional.'' In a concession to French wishes, the statement did not name Libyan diplomats stationed in East Berlin. Both American and British military commanders had pressed for a specific ban on Libyan envoys on the ground that they were implicated in the bombing of the discotheque, which took the lives of an American serviceman and a Turkish woman and left 230 others wounded.