The Syrian government has approved access to seven besieged areas after crisis talks in Damascus.
The UN says convoys are expected to set off in days.
UN Special Envoy Staffan de Mistura got the green light after talks with Foreign Minister Walid al-Moualem.
Mr de Mistura said the government's commitment to allow access would be tested on Wednesday (local time).
The meeting came while the Syrian government was advancing with the help of Russian air strikes, and just before an internationally agreed pause in fighting was due to take effect.
Last Friday global powers met Munich, agreeing to ceasefire in hopes talks would continue.
Russian Foreign Minister Sergei Lavrov, U.S. Secretary of State John Kerry and UN Special Envoy for Syria, Staffan de Mistura (Reuters)
The deal won't take effect until the end of this week and wasn't signed by the Syrian warring parties.
Newshub. / AAP