RIYADH — Two Saudi nationals were executed on Wednesday after they were sentenced to death for separate murders, the Interior Ministry announced. Marwan Al-Balawi was convicted of stabbing to death another Saudi, Saif Al-Wabsi, during a dispute in Madinah, said a ministry statement carried by the Saudi Press Agency. Hussein Al-Yami was executed for having shot dead Hamad Al-Jaafar in the southwestern province of Najran, SPA said.