BREAKING: At least one person was killed and several others were injured after explosions rocked the Brussels airport and subway system Tuesday moing, days after a key suspect in last November's Paris terror attack was apprehended in the city.
Authorities did not immediately confirm that the explosions were a terror attack. However, Belgium's interior minister aounced that the terror threat was being raised to its maximum level. Flights were canceled and arriving planes were diverted, while all public transportation in Brussels was shut down. Security was also tightened at all Paris airports.
"One person has died and perhaps there are several more," said a police official at the airport told the Associated Press.
Brussels Airport spokesman Anke Fransen confirmed that the blasts occurred shortly after 8 a.m. local time (3 a.m. EST). Reuters, citing the Belga news agency, reported that shots were fired and shouting in Arabic was heard before the explosions.
Zach Mouzoun, who arrived on a flight from Geneva about 10 minutes before the first blast, told BFM television that the second, louder explosion brought down ceilings and ruptured pipes, mixing water with blood from victims.
"It was atrocious. The ceilings collapsed," he said. "There was blood everywhere, injured people, bags everywhere."
"We were walking in the debris. It was a war scene," he said.
About 80 minutes after the airport blasts, an explosion was reported at the Maelbeek subway station, not far from the headquarters of the European Union. Rescue workers set up a makeshift treatment center in a local pub. Dazed and shocked moing travelers streamed from the metro entrances as police tried to set up a security cordon.
Alexandre Brans, 32, who was wiping blood from his face, said: "The metro was leaving Maelbeek station when there was a really loud explosion. It was panic everywhere. There were a lot of people in the metro."
First responders ran through the street outside with two people on stretchers, their clothes badly to.
The explosions at the airport hit at the middle of the busiest time there. Smoke was seen billowing out of the terminal while other images showed a security officer patrolling inside a hall with blasted paneling and what appears to be ceiling insulation covering the floor. A member of Belgium's parliament, whose wife was at the airport, told Belga that the wounded were struck by flying glass and ceiling tiles.
Marie-Odile Lognard, a traveller who was lining up in the departures hall for a flight to Abu Dhabi, told BFM television that people panicked after the first explosion about 20 meters from her and that a second explosion about 15 seconds later caused parts of the ceiling to collapse.
"I knew it was an explosion because I've been around explosions before," said Denise Brandt, an American woman interviewed by Sky television.
"I felt the explosion, the way it feels through your body. And we just looked at each other and I said let's go this way. It was over there. There was just this instinct to get away from it. Then we saw people ruing, crying, toward us. So I knew we were going in the right direction and away from it. "
Amateur video shown on France's i-Tele television showed passengers including a child ruing with a backpack dashing out of the terminal different directions as they tugged luggage.
With three runways in the shape of a "Z," the airport coects Europe's capital to 226 destinations around the world and handled nearly 23.5 million passengers in 2015.
The explosions happened only days after Salah Abdeslam, the prime suspect in the Nov. 13 Paris attacks that killed 130 people, was arrested in Brussels.
The Associated Press contributed to this report.

