Explosion occurred during a pro-Palestinian rally.
Israel had issued warnings about potential strikes in the area.
Tensions are escalating in the nearly two-week war between Israel and Iran.
Strategic angle: A blast rocked a major pro-Palestinian rally in Tehran on Friday after Israel warned it could target the area.
Explosion occurred during a pro-Palestinian rally.
Israel had issued warnings about potential strikes in the area.
Tensions are escalating in the nearly two-week war between Israel and Iran.