Police are questioning a "suspect" arrested after Saturday's deadly shooting at the Brussels Jewish Museum, which left three people dead and one badly hurt, prosecutors said. "A person left the scene in their vehicle. We have identified and arrested them. But we do not know if they have a link to the events," a prosecution spokeswoman told a news conference, adding that the person was being "heard as a suspect". Prime Minister Elio Di Rupo said earlier that Belgians stood "united... faced with this hateful attack on a Jewish cultural centre."