Brussels attack: 'Where are we going to be safe in this world now?'

Brussels attack: 'Where are we going to be safe in this world now?'

Europe is on alert tonight, after another terror attack left more than 34 people dead.

At least 250 more were injured as a series of bombs ripped through Brussels Zaventem Airport and a metro station.

As Belgian Prime Minister Charles Michel put it: "What we feared has happened."

It was rush hour, 8am, the airport was packed. With no warning, two explosions ripped through the departure terminal.

It was suddenly a chaotic battlefield. At least 14 people were killed.

Police urged survivors to leave the dead and dying and save themselves. Many did, running in search of safety.

"I'm terribly distressed," says one traveller at the airport during the attack. "I was travelling with my grandson for the first time. He was full of excitement. Then suddenly we heard an explosion, in fact two explosions. Where are we going to be safe in this world now? I am thinking of this little one now. Imagine if something happened."

"I said to my colleague 'We must go. I do not want to die today'," says another traveller. "She said, 'No, too scared' I say, I said, 'No, if we are the only ones here they will kill us.'"

The wounded still covered in blood, the terrified, the weary, were slowly taken away.

Islamic State has claimed responsibility, and Belgian police released a photo of the alleged attackers. The say two blew themselves up.

Gloves on their left hands were possibly used to hide the detonators.

A man in white in security footage is now Europe's most wanted terrorist, and the hunt is on to find him.

The first bomb went off next to an excess baggage payment kiosk and the second next to a Starbuck's café.

The first was likely a suicide bomb. It's thought the other was hidden in a suitcase. A suicide vest and rifle were also reportedly found.

New Zealand couple Sarah and James Spence live just down the road. They hunkered down with their children listening to endless sirens.

"It's just continual and you're constantly reminded," says Ms Spence. "I suppose even though you feel you're safe you just know that it's chaos on the other side of the walls."

As Belgium's capital tried to come to grips with the attack, a third bomb exploded at a busy metro station.

In pitch darkness, crying children clung to parents as they made their way out along the tracks. At least 20 more were killed, and dozens more injured.

It was a dark day for Brussels, with so many lives sacrificed for an ideology built on hate.

Belgium has now moved to the highest level of alert -- level four -- which denotes a "serious and imminent attack" is likely. Other countries, including the UK, Germany, France and Spain have a heightening level of alert, meaning there is a serious risk of a terrorist attack.