The United Nations has agreed to airlift food to help some of the 12 million people affected by drought in the Horn of Africa. Aid agencies say one in three Somalis is now at risk from famine.

The move follows Monday's emergency meeting with aid agencies and charities in Rome.

The UN says it's so far received $1bn, but needs the international community to donate a billion more by the end of the year to stave off widespread starvation.

The World Bank has promised 500-million-dollars for the region. However, $12m will be immediately released for relief projects for those worst hit by the drought.

Al Jazeera's Jamal ElShayyal reports on the crisis.