The assailants who fired these rockets are unknown.[43] 28 May 2013: Three Lebanese soldiers were killed by unknown gunmen in an ambush east of Arsal.[44] 30 May 2013: Fighting between Amal supporters and Palestinian gunmen erupted in the Farhat neighborhood of Beirut’s southern suburbs, casualties unknown.[45] 2 June 2013: A clash between FSA and Hezbollah fighters in the Bekaa Valley reportedly led to the deaths of one Hezbollah fighter and fifteen FSA fighters, according to Lebanese security sources.[46] 3–4 June 2013: The attempted assassination of two pro-Hezbollah Sunni leaders in Lebanon triggered a fresh round of clashes in Tripoli.