Hezbollah denies firing three rockets Thursday. Israeli officials blame Al Qaeda militants.
Both sides are maneuvering for another ceasefire, and Israeli troops are not likely to invade the Gaza strip, say analysts.
In a move to avoid a second deadly battle in a Palestinian refugee camp, some groups have taken a rare step away from Islamist militancy.
The Marine barracks bombing 25 years ago ushered in a new era of large-scale Al Qaeda attacks against the US and its allies.
The weekend bombing that killed at least 17 people was the worst of its kind since Syria's battle with the Muslim Brotherhood in the 1970s and 80s.
Lebanon's new government is slated to review the militant Shiite party's weapons as part of a national defense strategy once it takes office. The prisoner swap with Israel has given Hezbollah new leverage.
Fighting in Tripoli is indicative of rising Sunni-Shiite tensions as the formation of a new government hits an impasse. Religious leaders called for calm Wednesday.