Immediately, Syria, Iraq, and Jordan launched air strikes against Israel. Syria and Jordan also carried out sustained artillery bombardments of Israel and even initiated ground operations (in the Tel Dan region in upper Galilee and the Ramat Rachel area in Jerusalem). Within hours, Israel extended the air strikes to the airfields in Iraq, Syria, and Jordan.
Yemen's Houthi rebels commit to peace plan in letter to UN chief, BBC reports (Haaretz)
from the article: Six Day War breaks out, this time on Twitter