These are the men believed to be behind the Brussels attacks

Belgian Federal Police released an image, captured from airport security footage, which shows three men suspected to be involved in Tuesday's attacks which killed at least 30.

None of the men have been publicly identified yet, but Belgian police have issued a "wanted" notice for the man seen wearing a hat in the photograph.

The Islamic State has claimed responsibility for the attack. US officials told NBC that the claim "appears genuine."

Significantly, the two men on the left are wearing a single glove on their left hands. Security sources told Belgian newspaper La Libre that the gloves were likely meant to hide the triggers for their bombs, the Telegraph reported.

Belgian federal prosecutors had reportedly asked the media not to release the airport surveillance photo for the sake of the investigation, Reuters reported, but it was leaked on social media.

At least 30 people were reported killed and dozens more wounded after explosions ripped through Zaventem Airport and a metro station in Brussels on Tuesday morning.

The attacks came days after Saleh Abdeslam, a suspect in last year's Paris attacks, was arrested in the Belgian capital, which is also the de facto capital of the European Union.

Belgian officials have long been aware of the existence of an ISIS-linked terrorist cell in Brussels, believed to be centered in the district of Molenbeek. Belgium's interior minister, Jan Jambon, has called Molenbeek "the capital of political Islam in continental Europe," and multiple suspects have been arrested there in connection to November's Paris attacks that killed 130 people.