The U.S. tightened its sanctions against Libya.

Regulations issued by the Treasury Department would broaden the current ban to include sale of oil drilling and refining equipment to foreign countries in cases where the American company knows that the product is intended for eventual sale to Libya. In January, President Reagan ordered all American companies and workers out of Libya, froze Libyan assets in this country and banned American export sales to Libya. The department said violations of the trade restrictions carry a maximum penalty of $50,000 and a 10-year prison sentence.