(CNN)Attacks in Belgium's capital killed at least 20 people at the Maelbeek metro station and at least 10 more at the international airport on Tuesday. ISIS claimed responsibility. Adelma Marina Tapia Ruíz, a wife and mother of two, died during the airport attack. Adelma Marina Tapia Ruíz, a wife and mother of two, died during the airport attack. The first victim to be identified is Adelma Marina Tapia Ruíz, who was killed during the attack at the airport, according to Peruvian state news agency Andina. Originally from Peru, Tapia Ruíz had lived in Belgium for six years and was at the airport with her husband and twin 3-year-old daughters waiting to board a plane when the blasts went off. The city remains largely on lock down and the airport stayed closed Tuesday. Much of Brussels transportation system has been interrupted although some services have resumed operation. Multiple countries including the U.S., UK, and Netherlands are advising against travel to Brussels. Here's what we know: The attacks Airport: About 8 a.m. local time, two explosions struck the departure lounge of Brussels Airport in Zaventem. Video: They saw the Brussels attack Video: They saw the Brussels attack 01:45 One was a suicide bombing, according to Belgian prosecutor Frederic Van Leeuw. The other remains under investigation. One blast took place outside the security checkpoints for ticketed passengers and near the airline check-in counters, according to an airline official briefed on the situation. A bystander's video captured the horror of the aftermath, with people motionless on the floor and dust hanging in the air, obscuring visibility. A third bomb was left at the airport but didn't go off, according to Belgian Interior Minister Jan Jambon. Metro station: About an hour after the airport explosions, another blast rocked the Maelbeek metro station toward the end of rush hour. The station is in the heart of the city, where European Union institutions are based, a symbolic target for terrorists. NATO is also headquartered in Brussels. Bystander video depicted passengers stepping down from the cars in a dark tunnel, with a child crying. The investigation Suspects: Belgian authorities released an image of three suspects in Tuesday's Brussels Airport attack. Brussels under attack Brussels under attack 00:59 Two of them carried out suicide attacks, and a third one is believed to have been a guide to ensure the other two would carry out the attacks, according to Van Leeuw and experts. That third individual, dressed in a light jacket and hat, is being sought, the prosecutor said. Information on suspects in the metro station attack wasn't immediately available. Belgian authorities have shared with security counterparts in the United States and elsewhere the names of several people they believe may have some role in the attacks, according to multiple U.S. officials. The names are being run through databases of suspected or known terrorists. But the identities of the bombers aren't clear to U.S. authorities, either because Belgian authorities haven't completed identification or haven't shared that information with counterterrorism officials in the U.S., the officials said. Investigators have used surveillance video to track the movements of the three men seen in the photo released, one U.S. official said. The three are seen leaving a taxi and moving through the airport, according to two officials. The third man, dressed in white, left the airport after accompanying the two. That appeared to be planned, the officials said. Raids: Police raids connected to Tuesday's attacks were happening in the Brussels region, with authorities looking for suspects linked to the explosions, Belgian broadcaster RTBF reported, citing judicial sources. A taxi driver who drove the suspects to the airport told investigators the location where he picked up the three men. He recognized the men from the surveillance images, officials said. Investigators were searching residences, but they weren't saying where, Van Leeuw said. At least one police helicopter with a sniper hovered over the Schaarbeek neighborhood as darkness fell Tuesday. The chopper apparently provided cover for raids unfolding on the ground, analysts said. "During a house search in Schaarbeek, investigators found a nail bomb, chemical products, and an ISIS flag," the federal prosecutor said in a statement.

• published: 23 Mar 2016
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