BERLIN, August 4. /TASS/. Humanitarian corridors under UN control are necessary to provide civilians in the besieged Syrian city of Aleppo with supplies, German Foreign Minister Frank-Walter Steinmeier told Bild newspaper in an interview published on Thursday.

"We are now talking about preventing an even more serious catastrophe for the civilian population. For this, we need UN-controlled humanitarian corridors via which water and food can be delivered to people in Aleppo," Steinmeier said. He once again called on all warring parties to lay down their arms.

On July 28 Russian Defense Minister Sergey Shoigu said that Russian and Syrian militaries are starting a large-scale humanitarian operation in Aleppo. Four humanitarian corridors will be established there. Civilians will be able to leave Aleppo via three corridors, while one more corridor may be used by militants who wish to lay down arms. The defense minister also ordered to airdrop food, medicaments and necessities to civilians in Aleppo.