More than 21,000 people are now known to have died in Monday's earthquakes in Turkey and Syria, which Turkey's president has called "the disaster of the century".
A major international relief effort is gathering pace.
On Thursday, the World Bank pledged $1.78bn (£1.38bn) in aid to Turkey including immediate finance for rebuilding basic infrastructure and to support those affected by the earthquakes.
The US pledged a package of $85m to both countries.
Meanwhile, the efforts of 100,000 or more rescue personnel on the ground are being hampered by logistical hurdles including vehicle shortages and devastated roads.