Military Action:
Heavy fighting erupts in southern Beirut suburbs between LAF and Amal miliita; US Marine compound at airport hit by artillery and mortar rounds; US warships and Marine shore battery return fire; fighting resumes around Souq al-Gharb; rockets hit Defense Ministry, fall near presidential palace and US Ambassador's residence.
Casualties:
4 Marines wounded; 2 members CBS-TV crew wounded at Souq al-Gharb; 30 LAF soldiers captured, then released, by Amal in Burj al-Barajneh; 11 Muslim civilians reportedly killed by LF in Mraije.
Political Responses:
Palestinians/ Lebanese: Lebanese National Resistance Front issues warning in Damascus against members of MNF deepening their involvement in Lebanon fighting.
US and Other Countries: Senate Foreign Relations Committee approves by 9-7 vote a resolution authorizing president to keep Marines in Lebanon for further 18 months; European MNF members announce diplomatic initiative independent of US to obtain Lebanon cease-fire.