A series of deadly explosions rocked Belgium's capital Tuesday, targeting the main airport of Zaventem and the city's metro system.
Belgian Prime Minister Charles Michel told a news conference that terrorists had committed murder, labeling it a cowardly attack and calling it a black day for the country.
CNBC has compiled tweets from within Brussels and around the world reacting to the deadly attacks:
Some Belgians are offering their homes and transportation to people who are stranded and left without a place to go. They are using the hashtag #IkWilHelpen ("I want to help"), #PorteOuverte ("open door"), and #OpenHouse to demonstrate their willingness to help.
The famous cartoon character Tintin became a symbol of solidarity on Tuesday. In the book The Adventures of Tintin, Belgian cartoonist Georges Remi described Tintin as a brave investigative journalist who solves mystery. Following the attacks, Tintin was crying for his home.
You can find CNBC's complete coverage of the Belgium attacks here.