Following the terrorist attacks in Paris on 13 November and subsequent police raids in Belgium and France, the Belgian government has increased its national threat level to the top level, very serious, for the Brussels region, indicating that the threat of a terrorist attack is serious and imminent; people should avoid places where there is a high concentration of people, particularly in the Brussels region, including concerts, large events, stations and airports, public transport, busy shopping centres; follow the advice of local authorities and subscribe to email alerts for updates to this travel advice; the whole Brussels metro network will be closed on 21 and 22 November, many events such as football matches will be cancelled.