Zelenskyy, who in recent months has repeatedly warned about Belarus becoming more involved in Russia's war against Ukraine, added that he had instructed the service's chief to inform Kyiv's partners about these plans.New massive attack incoming?Speaking in his nightly video address, Zelenskyy also said that Ukrainian intelligence believed Russian forces were preparing a new, imminent mass attack on the country.He suggested the new attack could occur on Monday, but gave no further details of a time frame or possible targets."Please pay attention to air raid alerts today. Intelligence indicates that Russia may be preparing a massive strike," he said. "Relevant orders for air defense have already been issued."Russian forces have regularly staged air strikes on Ukrainian towns and cities, mainly at night and including the capital Kyiv. Energy infrastructure has been a repeated target.