"To guarantee total security for the convoys to Aleppo there will be humanitarian windows established from 1000 to 1300 local time starting tomorrow during which all military hostilities, aviation strikes and artillery strikes will be halted," Lieutenant General Sergei Rudskoy of the Russian army's general staff told journalists.
The pause would take place daily from Thursday from 0700 GMT to 1000 GMT, although Rudskoy did not specify how many days it would continue.
"To meet that capacity of need, you need two lanes and you need to have about 48 hours to get sufficient trucks in," Stephen O'Brien, UN under-secretary general for humanitarian affairs, told reporters.
"When we are offered three hours, you have to ask what can be achieved in that three hours."
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The United Nations has called for urgent aid access to Aleppo and 48-hour weekly pauses for the aid deliveries, warning that civilians are at grave risk from water shortages and disease as fighting has intensified.
O'Brien said he had not been fully briefed on the Russian proposal but that there were complicated logistics to address, such as ensuring that truck drivers have enough time to safely make the trip to the city and back.
Today the markets in opposition-held districts of Aleppo were the fullest they have been in weeks as food stalls and shops had been empty of customers after a government siege of the eastern districts led to rising prices and shortages.
Shoppers scurried through the vegetable markets, buying as quickly as possible in case a siege is re-imposed or prices rise again, an AFP correspondent at the scene saw.
Rudskoy said that "more than 1,000 were killed and about 2,000 wounded" in the rebel ranks over the past four days southwest of Aleppo.