US travel alert after Brussels attack

March 23 (TravelAndy): Following terrorist attack in Brussels, The U.S. has issued travel alert for its citizens travelling to Europe, said CNBC.

The alert has been issued till June 20.

Citizens are alerted to practice vigil while in public places and travelling in public transports.

U.S. nationalities have also been cautioned to avoid crowded places, especially on religious and public events.

Brussels, the capital of Belgium, is a popular tourist destination in Europe.