Karachi shut down on Monday for a day of mourning to honor the dead.

NPR: Pakistani Shiites Mourn As Bomb Death Toll Hits 45

The mourning for the victims of Monday's attack reached northeastern China, home of the third person killed in the blasts, Lu Lingzi.

WSJ: Obama Attends Boston Service as Officials Probe Videos

The last time it happened was in 2007, when markets closed for New Year's Day on Monday and then on Tuesday for a day of mourning for the death of former President Gerald Ford.

WSJ: Behind Decision to Close Markets

On Monday, the first of Brazil's three days of mourning, flowers were left outside the club in tribute to the victims, and a flag outside the country's presidential palace flew at half-staff.

CNN: Four arrested after deadly Brazilian nightclub fire