maputo mozambican president filipe nyusi sack four minister include foreign affairs energy portfolios office say late tuesday without give reason energy key portfolio mozambique vast untapped offshore gas reserve develop oil major italy eni nyusi office say ernesto max elias tonela replace leticia da silva klemens minister energy mineral resources jose condugua antonio pacheco new foreign minister replace oldemiro baloi president also replace minister industry trade agriculture food security tonela new energy minister previously serve commerce minister economist train tonela also work previously board hidroelectrica de cahora bassa hcb company responsible mozambique 2,000 megawatt hydroelectric dam mozambique president replace energy foreign minister