By Ali Sawafta NABLUS, West Bank (Reuters) -Israeli forces killed two Palestinian fighters in a pre-dawn clash in the occupied West Bank on Sunday and, off the coast of the Gaza Strip, attacked a fishing boat accused of smuggling in Hamas supplies from Egypt after its two crewmen escaped. The Fatah Al-Aqsa Martyrs Brigades militant group claimed the two Palestinians slain at a house in Nablus as its members. The Palestinian Health Ministry said six others were wounded. Israeli security forces on an apparent arrest raid outside the house of a wanted suspect came under fire by gunmen and “respon…