Palestinian sources said Sunday the Israeli army killed an unknown number of Palestinian militants on the Gaza-Egyptian border south of the Gaza Strip. They said the gunmen were members of al-Aqsa Martyrs Brigades, the armed wing of the mainstream Fatah movement, and were on their way to "carry out a military operation against Israeli targets south of Rafah" before Israeli gunfire killed them. The sources added their bodies were still lying on the street and accused Israeli forces of preventing Palestinian medics from nearing the area.The incident came as al-Aqsa Brigades issued a statement urging activists to mobilize and strike "Israeli targets everywhere" in retaliation for the latest Israeli military incursion in Khan Yunis, which ended Saturday after killing more than a dozen Palestinians, mostly militants, and injuring many more. The statement accused the Israeli government of Prime Minister Ariel Sharon of responsibility for the "recent escalation and massacres of the defenseless Palestinians people across the homeland, which sabotaged any calming process on the Palestinian arena." Earlier in the day, the Israeli army raided Beit Hanoun in the Gaza Strip after Palestinian mortars and home-made al-Qassam rockets hit Jewish settlements and farms overnight.