Africa News Tonight: On World Press Freedom Day, Muthoki Mumo, sub-Saharan Africa Representative for the Committee to Protect Journalists talks about physical attacks on journalists, calling them an extreme form of oppression. Police in Zambia have surrounded the home of former President Edgar Lungu and are demanding they search it as part of a corruption probe. And, a top United Nations official is calling on Sudan’s rival military leaders to publicly commit themselves to the safe delivery of humanitarian assistance to millions of people struggling to survive amid escalating fighting. For this and more, stay tuned to Africa News Tonight!