Addressing the summit on a video-link, Ukraine's president appealed for more heavy weapons from Western allies.
G7 leaders are under pressure to be united in their approach against increasing Russian aggression, BBC said.
Brutal and unprovoked
"We will continue to provide financial, humanitarian, military and diplomatic support and stand with Ukraine for as long as it takes," they said in the statement on Monday.
Canada, France, Germany, Italy, Japan, the UK and the US have convened in Bavaria, Germany along with two representatives of the European Union to discuss Russian President Vladimir Putin’s invasion of the neighboring nation that has the potential of aggravating povertyaround the world.
The high-level talks occurred in the backdrop of escalated attacks by the Russian forces on eastern Ukraine, where officials told BBC a busy shopping centre was struck by a missile in the city of Kremenchuk, killing at least two people.
Zelenskyy urged the Western allies to keep the pressure on Russia with more sanctions.
In their joint statement, the G7 leaders said they remain committed to "sustaining and intensifying" sanctions against Putin's government and enablers in neighbouring Belarus. There will be sanctions on gold and oil exports and also "targeted sanctions on those responsible for war crimes."