United Nations secretary-general Antonio Guterres on Monday launched efforts to promptly explore arrangements for a humanitarian ceasefire in Ukraine to allow delivery of aid and also pave the way for serious political talks to end the war in the country, which has been going on for more than a month. Since the beginning of the war in Ukraine by Russia on February 24, the UN's humanitarian agencies and their partners have provided food, shelter, water and hygiene supplies to nearly 900,000 people, mainly in eastern Ukraine, Guterres said, according to the Associated Press.