TEHERAN STUDENTS SEIZE U.S. EMBASSY AND HOLD HOSTAGES
Iranian Moslem students storm US Embassy, Teheran; seize about 90 Americans and vow to stay there until deposed Shah is sent back from NYC to face trial; there are no reports of casualties although some of several hundred attackers are armed; Ayatollah Khomeini reportedly supports attack, which came as tens of thousands of people marched through streets on first anniversary of shooting of Teheran University students by Shah's security forces; US charge d'affaires L Bruce Laingen is not among those seized; takeover follows series of strongly anti‐US speeches by Khomeini; illus; map (M)
