By Andrew L. Jaffee

Turkey’s constitutional crisis over electing a new president has stirred passions. Approximately 50,000 Turks attended a rally Sunday to voice their support for secularism. On April 29, “More than a million Turks rallied here [Istanbul] … in support of secular democracy.” Today, somebody set off a bomb in Ankara. Was it related to the constitutional crisis? Was it Kurdish separatists? Islamic militants? From the Beeb:

…The blast occurred during evening rush hour at the entrance to a shopping centre in the district of Ulus. …

Unconfirmed reports suggest an explosive device may have been left at a nearby bus stop. …

Much of the front of one building was ripped off by the blast at the Anafartalar shopping centre.

TV footage showed several people lying seriously injured on the pavement surrounded by piles of concrete and glass. Other people, possibly passers-by, were hurt by flying glass.

“There was a sudden explosion, everything turned to dust. I could hear people screaming,” eyewitness Cenk Yedier told AP news agency. …