(Adds Israeli military comment) GAZA, Nov 8 (Reuters) - An Israeli military aircraft fired a missile at a car in Gaza City on Wednesday, killing two Palestinian militants, a Palestinian security source said. The source identified the dead men as members of al-Aqsa Martyrs Brigades, an armed wing of President Mahmoud Abbas's Fatah faction. But Islamic militant group Hamas claimed them as its own, saying one of them had overseen cross-border rocket salvoes. An Israeli military spokesman said the air strike targeted a Hamas rocket commander. Hamas and Al-Aqsa Martyrs Brigades are among militant groups spearheading a more than 6-year-old Palestinian uprising against Israel.