Yes, that sounds right. The police were supposedly on the scene for a little while before it blew up. It makes sense that they would broadcast. Makes no sense if the bomber did it UNLESS they were sending a message that they could do this any time they wanted.
They are sending a message that they can do this any time anywhere. Now we wait for demands.
THAR is what I was telling my wife. This was detonated smack in the middle of tourist central. I suspect someone is sending a message. “ We can do this anywhere, anytime “