April 1 (UPI) -- At least three people were killed and seven injured early Tuesday after Israeli warplanes struck a southern suburb of Beirut for the second time in four days, threatening a tenuous four-month-long cease-fire between Israel and Hezbollah . According to the Lebanese health ministry, the casualties were all in the Dahieh district in the southern part of Beirut, a stronghold of the Iran-backed Hezbollah group. Advertisement The strike in the middle of the night caused a building to