Relief organizations in Yemen have warned their operations will be suspended in days if a blockade by Arab countries on the country's ports is not lifted.
Organizations said in statements their operations are facing huge challenges including shortage of fuels and lack of safe passages to deliver aid.
If sea, air and land ports are not reopened urgently and shortages persist, relief operations will not continue, organizations said.
The warning came a day after the UN demanded the Arab countries conducting airstrikes on the Houthi militants to avoid targeting lifelines especially airports.
In recent days, fighter jets from the Arab countries struck Yemeni airports including Sanaa International Airport after Iranian planes allegedly carrying aid violated the blockade and attempted to land in Sanaa.
Iran has been accused of backing the Houthi militant group and providing it with logistical support including weapons.
Saudi-led Arab countries intervened militarily after the Houthi militants with support from forces loyal to the former president had ousted Yemen's president and government.
As part of the intervention, the blockade has been imposed on all Yemeni ports since end of March.
The blockade aims to monitor the ports in order to prevent the militants from getting support especially weapons.
It had affected all imports and exports deepening lacks of all products including fuels.
The fuel crisis has been deepening for around one month forcing hospitals, power plants and businesses to shut down.