dominic kaner reports >> reporter: police move in to apprehend a suspect. the man had refused to comply with their requests to remove his rut sack. so they shot him. afterwards a robot was sent in to investigate. the man was wounded and arrested. those who witnessed the incident gave their reactions. >> translation: we heard a boom. we thought it might be a car accident. we then heard a second boom and saw loads of heavily-armed police. when we tried to get close they told us to get out of the way >> translation: we were asked to stay indoors all the time it was going on because the police were worried there mightanother shooter >> reporter: the threat level had been levelled suggesting that the danger had abated somewhat, but as these events show, tension in this city is still very high. the incident was not the only one in brussels on friday. other people were picked up by the authorities elsewhere in the city. the investigation into the bombings now shows that one of the airport bombers was najim laachraoui. his brother has now spoken to the media. he to

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