The United Nations says one of its staff members was killed and another injured as they travelled to a hospital in southern Gaza on Monday.It said the workers were travelling in a UN vehicle to the European Hospital in Rafah when it was struck.The UN did not mention who it thought was responsible for the attack.The Israeli military said an initial inquiry indicated the vehicle was struck in an active combat zone and it had not been made aware of its route.The Israel Defense Forces (IDF) confirmed it had received a report from the UN Department of Safety and Security (UNDSS) that said two…