The Israeli forces had entered the camp on Sunday looking for two Palestinian fighters and shot at Qozah and another man as they tried to flee.
The Al Aqsa Martyrs' Brigades is an armed group loosely linked to Fatah, the party headed by Mahmoud Abbas, the Palestinian president.
Gaza deaths
One fighter from the Islamic Jihad and one from the Popular Risistance Committees were killed in the Gaza Strip.
The two were killed in an exchange of gun fire, after an Israeli patrol saw them approaching the border fence between the Gaza Strip and Israel, Palestinian officials said.
Palestinian witnesses and medics said the two men died in an exchange of gun fire after shooting on an Israeli patrol that had entered the central Gaza Strip.
Later in the day eight people were wounded in the north of the Gaza Strip by Israeli artillery fire, medics said