According to IranNewsNow:
Reports of many injuries in Esfahan.
As the videos start streaming in, there are reports of clashes in several cities: Tehran, Mashad, Esfahan.
Large crowd chanting loudly, suddenly chaos ensues
More breaking developments via EA:
1005 GMT: North Tehran is the scene of “sporadic and at times heavy” clashes, especially at Vanak Square. That is notable, since Vanak had been relatively free of clashes in demonstrations in November and December, including Ashura.
1000 GMT: Farda News is reporting that former President Hashemi Rafsanjani participated in the rally today at Enghelab and Palestine Streets.
0940 GMT: The mainstream site Mardomak is calling the security forces on Tehran’s streets “akin to a military regime”.