A military court in Hamas-ruled Gaza has sentenced a man to death by firing squad for allegedly collaborating with Israel. Hamas spokesman Mohammed Nahal provided no other details Sunday and said he did not know how many Gazans were on death row. The death sentence technically cannot be carried out unless Palestinian Authority President Mahmoud Abbas approves it. Abbas has not allowed executions to take place since he came to power in 2005. However, rights groups say Hamas executed 17 men who escaped jail during Israel's three-week military operation in Gaza last month. The groups say most of those killed were suspected collaborators.