OTTAWA — The Belgian capital Brussels has entered its third day of lockdown, with schools and underground transport shut and more than 1,000 security personnel deployed across the country. Brussels remains at maximum alert over information about an “imminent threat,” possibly a series of co-ordinated attacks at different locations similar to those in Paris on Nov. 13.

The Brussels Airport remains open and fully operational, with no flight delays expected.

Alert level 3 maintained at #brusselsairport. Increased vigilance still applied but the airport is operational & flights are not impacted.

— Brussels Airport (@BrusselsAirport) November 22, 2015

The government of Canada is advising travellers in Belgium to exercise a high degree of caution because of the threat of terrorism.

While the Belgian government hasn’t issued a nationwide security alert, the Canadian government advised all travellers in the country to be cautious.

Canada issued its alert this morning.