ANTAKYA/KAHRAMANMARAS, Turkey, Feb 19 (Reuters) - More than 46,000 people have been killed in the earthquake that struck Turkey and Syria and the toll is expected to soar, with some 345,000 apartments in Turkey now known to have been destroyed, and many still missing.

As Turkey attempts to manage its worst modern disaster, concerns were growing over the victims of the tragedy in Syria, with the World Food Programme (WFP) pressuring authorities in the northwest to stop blocking access to the area as it seeks to help hundreds of thousands of people ravaged by earthquakes.

The head of Turkey's Disaster and Emergency Management Authority (AFAD), Yunus Sezer, said the search and rescue efforts will largely be terminated on Sunday night.

The death toll in Turkey stands at 40,642 from the quake while neighbouring Syria has reported more than 5,800 deaths, a toll that has not changed for days.

Speaking to Reuters on the sidelines of the Munich Security Conference, WFP Director David Beasley said the Syrian and Turkish governments had been cooperating very well, but that its operations were being hampered in northwestern Syria.

The agency last week said it was running out of stocks there and called for more border crossings to be opened from Turkey.