A concert decades in the making. The Rolling Stones rock havana. He be thousands of people have gathered in the belgian capital to remember those who lost their lives in tuesdays terrorist attacks. Police arrested three more people on friday. Dominic cain reports from brussels. Reporter police move in to apprehend a suspect. He failed to comply to remove his rucksack so they shot him. After a robot was sent in to investigate. The man was wounded and arrested. Those who witnessed the incident gave their reactions. Translator 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. Translator we were asked to stay indoors all the time it was going on because the police were worried there might be another shooter. Reporter on thursday acknowledge the belgian authorities had reduced the threat level suggesting that the danger had abated somewhat but as these incid