"It's an unprecedented situation. Israel, having previously prioritized aiding Ukrainian war refugees, now seems to be regressing," Yair Smolyanov of the One Million Lobby said.
In recent days, Ukrainian remotely piloted boats, also referred to as drones, have attacked a Russian fuel tanker and a navy base at Russia's Novorossiysk port on the Black Sea.
"Autumn is very soon, but there is still time to prepare for the summit and involve most of the world's countries," Zelensky said.
Buildings and silos alike went up in flames following alleged Russian drone attacks.
Russia has said it would treat any ships leaving or entering Ukrainian ports as valid targets.
Russia feels vulnerable from both the war and the peace camps, but its response to real or perceived challenges only heightens the impression of weakness.
Russian news agencies quoted the Health Ministry as saying 12 people required medical assistance and four were taken to hospital.
"By extending a helping hand to those in need, Israel can uphold its founding principles and fulfill its moral obligation to the Jewish people."
Building upon the success of previous years, Mosaic United has said it continues to prioritize the "enrichment of Jewish identity and connection to Israel."