Israeli forces are “systematically” blocking access to people in Gaza, complicating the task of delivering aid in what has become a lawless war zone, the United Nations said on Tuesday. It has become nearly impossible to evacuate the sick or wounded and deliver aid in northern Gaza and increasingly difficult in the south, said Jens Laerke, spokesman for the UN humanitarian agency OCHA. All planned aid convoys into the north have been denied by Israeli authorities in recent weeks. The last allowed in was on January 23, according to the World Health Organization. Even convoys cleared in advance …