Two explosions rocked the check-in zone of Brussels Airport on Tuesday, while another explosion shook a metro station in the Belgian capital, killing and wounding scores of people.

What we know

• The casualties: At least 31 people were killed and more than 270 wounded in the attacks. An American couple who were at the airport are missing.
• The suspects: ISIS claimed responsibility for the attack, believed to have been carried out by at least two people, brothers Khalid and Ibrahim El Bakraoui. A manhunt is on for a third suspect, Najim Laachraoui.

Here's the latest:

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