The police reveals new details in the investigation of attacks occured in Brussels airport and subway on Tuesday.

Belgium lowered its security alert level one notch to three from the highest level. However, the police does its utmost to find those reaponsible for terror attacks in Brussels. According to Reuters, already seven people were arrested on suspicion of committing suicide bombings in Belgian capital.

Police informs that six persons were held during searches in the Brussels neighborhoods of Schaerbeek in the north and Jette in the west, as well as in the center of the Belgian capital. The seventh man was arrested in the Forest borough of Brussels today.

The attacks took place in Brussels on Tuesday. Cameras at the airport of Brussles pictured three men passing the airport’s check-in area with baggage carts. Two of them were soon identified. They were brothers Khalid and Brahim El Bakraoui, Brussels residents, both having criminal record. Two sources familiar with the situation state the Bakraoui brothers had been on U.S. government counterterrorism watch lists before the attacks.

One of the brothers, Brahim El Bakraoui, 29, had been expelled from Turkey in July after being arrested near the Syrian border. It was his second deportation. Turkish officials had informed Belgian and Dutch that Bakraoui could be a foreign fighter trying to reach Syria. However, the Belgian authorities considered that Bakraoui, who had skipped parole after serving less than half of a nine-year sentence for armed robbery, was a criminal but not a militant.

“You can ask how it came about that someone was let out so early and that we missed the chance to seize him when he was in Turkey. I understand the questions,” Jambon said. “In the circumstances, it was right to take political responsibility and I offered my resignation to the prime minister.”

The third man, wearing light clothing and a dark hat, stayed unidentified. But now there are security sources that insist that the other suicide bomber at the airport was Laachraoui, a veteran Belgian Islamist fighter in Syria suspected of making explosive belts for November’s Paris attacks. The daily De Standaard also provided information about the arrest of a man filmed by security cameras in the airport terminal next to two bombers who blew themselves up there. However prosecutors did not confirm the arrest and it is still known if the man was among the seven detained overnight.

The attacks were committed only four days after the arrest of Salah Abdeslam, one of the main suspects in the November terrorist attacks on Paris. According to the investigators, the Islamist jihadist network, guilty of the attacks, was involved in the November Paris events. Belgian public broadcaster VRT informs that Salah Abdeslam might have planned a similar shooting and suicide bomb attack in Brussels.

Islamic State, that has already took responsibility for the attacks, posted a video on social media calling the Brussels blasts a victory and featuring the training of Belgian militants suspected in the Paris attacks.

While the police continues the investigation, ordinary people all over the world feel sympathy to the victims of these inhuman events. The Telegraph publishes the heartbreaking story of Bart Migom, a 21-year-old student of Howest University, who had been flying to the US to join his girlfriend Emily Eisenman, 21. Bart was killed in the Brussels airport terror attack.

Emily appealed on CNN for news of him following the attack, showing photographs of him grinning and wearing a beanie hat. Boy’s parents desperately tried to find any information of him at the Brussels hospitals where the injured from the attacks were being treated. But on Friday morning Mr Migom’s father confirmed his son had been declared dead.

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