Israel called on the entire population of the northern Gaza Strip — about 1.1 million people — to move south in the Palestinian territory within 24 hours. Israeli strikes are pounding the densely populated enclave, and troops are massing nearby ahead of an anticipated ground incursion after Hamas militants staged one of the deadliest attacks in Israeli history. Hamas described the evacuation warning as psychological warfare and urged people not to comply. Gaza authorities said there was nowhere safe to go under siege, while health officials said it would be impossible to evacuate hospitals, which are already facing power shortages and dwindling supplies. In southern Lebanon, meanwhile, a journalist with the Reuters news agency was killed Friday while covering clashes there. Six other journalists were injured, including two from the Al Jazeera news channel, after the journalists were struck by what Al Jazeera said was Israeli shelling.