Horrifying Video: After Execution, Hamas Drags Body Through Street **VIEWER WARNING** AP- GAZA CITY, Gaza Strip - Masked gunmen publicly shot dead six suspected collaborators with Israel in a large Gaza City intersection Tuesday, witnesses said. An Associated Press reporter saw a large mob surrounding five of the bloodied corpses shortly after the killing. Some in the crowd stomped and spit on the bodies. A sixth corpse was tied to a motorcycle and dragged through the streets as people screamed, "Spy! Spy!" The Hamas military wing, Izzedine al-Qassam, claimed responsibility in a large handwritten note attached to a nearby electricity pole. Hamas said the six were killed because they gave Israel information about fighters and rocket launching sites. The killing came on the seventh day of an Israeli military offensive that has killed more than 120 Palestinians, both militants and civilians. Israel has launched hundreds of airstrikes, targeting rocket launching sites, weapons caches and homes of Hamas activists, as Palestinians fired hundreds of rockets at Israel.