By Steve Holland, Andrew Mills and Parisa HafeziWASHINGTON/DOHA/ISTANBUL (Reuters) - U.S. President Donald Trump announced on Monday a complete ceasefire between Israel and Iran, potentially ending the 12-day war that saw millions flee Tehran and prompted fears of further escalation in the war-torn region.

President Donald Trump says on social media that Israel and Iran have agreed to a “complete and total ceasefire” to be phased in over 24 hours.

President Trump announced Monday that Israel and Iran have agreed on a "Complete and Total" ceasefire, a move he said would end a more than week-long conflict between the two countries. The ceasefire will start in about six hours,