into the center. the iraqi forces have been fighting for weeks to prevent this overrunning. were unable to hold back. now in a troubling moment where the government appealed to shi'a militia to come in and try to push isis back. reports that iran's defense minister has flown into baghdad. perhaps to try to offer assistance iran can offer here. the issue is also how long advertised this potential issue has been because the fight has been going for a long period of time. there have not been adequate resources. we are hearing about 500 people may have lost their lives in the fight alone. thousands have fled. 100,000 have fled in the past months or so. fears are in the next 24 to 48 hours, isis will purge the city of anyone they think will have ties to the enemy.