The story behind this powerful cartoon thousands are sharing after the deadly attacks in Brussels

Two explosions shook Zaventem Airport and another ripped through the Maelbeek metro station in Brussels on Tuesday morning, killing at least 28 people and injuring dozens more.

Following news of the attacks, Le Monde cartoonist Jean Plantureux, better known as Plantu, shared a powerful image depicting the French flag hugging the Belgian flag. Under the French flag the date November 13 is written, while Belgium has March 22, the date of Tuesday's attacks.

In just two hours, more than 4,000 people have shared Plantu's work on Twitter. Take a look.

—PLANTU (@plantu) March 22, 2016

On Twitter, some are saying Plantu's cartoon is becoming a "symbol" of solidarity after the Brussels attacks.

—Cheryl Smith (@cherylsmith) March 22, 2016

Others note that Plantu's cartoon does not include the recent attacks in Ankara, Turkey.

—Burak (@burankownz) March 22, 2016

There are also other images circulating to show support for Brussels, but as of early Tuesday morning, Plantu's seems to be the most widespread.

—Pablo Alonso (@PablooAG12) March 22, 2016

—Fascinating Pictures (@Fascinatingpics) March 22, 2016

This isn't the first time a cartoon has gone viral after an attack. In November, an image of the Eiffel Tower drawn into a peace sign became a symbol in the days after the Paris attacks.