Struggle for survival
Last week, Ban Ki-moon, the UN secretary general, presented the Security Council with a report proposing the deployment of 27,000 peacekeepers to replace the stretched African Union force.
The Security Council has reviewed options for increased UN involvement in Somalia, but certain members have ruled out an early deployment of a full peacekeeping force.
The aid agencies said families left in the capital are among "the poorest of the poor who did not have the means to flee".
"Record high food prices, hyper-inflation and drought in large parts of the country is leaving communities struggling to survive," they said.