Tightening the noose around Eastern Ghouta...These images show Syrian forces breaking into a key town in the South of the enclave... Backed up by airstrikes.. ground troops were able to take control of parts of Hammuriyeh this Wednesday evening. ....Further shrinking the area held by the opposition... The government''s offensive has split the enclave into three sections, each controlled by different rebel groups. A strategy that has cut the rebels off from support and supply networks...And left around 400,000 civilians trapped in the crossfire... with little access to food or medicine... According to the UN, around 1000 people need urgent medical evacuation... Some sick and injured civilians was able to leave Ghouta''s largest town Douma this Tuesday and Wednesday. ....After a deal was struck between the government and rebel forces..SOUNDBITE - Mohammed al-Marhoum, doctor (man, Arabic, 9 sec):"Before, we could not treat people in Ghouta, some of them had not been treated in a year and were waiting to be evacuated."Ghouta is important to Bashar al-Assad due to its location in the eastern suburbs of Damascus. Within range of rebel mortars - making the capital vulnerable to rebel shelling.Long an irritant to the loyalist camp - anti-Assad insurgents in Eastern Ghouta have faced off against the Syrian army since the spring of 2013.