Demonstrators chanted "death to America" while some burnt US and Israeli flags after assassination of top military commander.
Iran has barred female spectators from football and other stadiums for around 40 years.
Iran shoots down US drown amid mounting tension since Trump imposed sanctions over the country's nuclear programme.
Tory leadership frontrunner's claim that Nazanin Zaghari-Ratcliffe was 'teaching journalism' in Iran are still used to discredit her, Richard Ratcliffe tells HuffPost UK.
Husband Richard Ratcliffe says the comments have left him 'disoriented'.
Supporters left 155 bunches of flowers, one for each week she has been held.
The British mum has been held in Tehran for more than 1,000 days.
Women in Tehran have embraced the obstacle-beating discipline of parkour. They say in the religiously-conservative society of Iran, parkour teaches them to overcome both physical and mental hurdles.
"This time I have not been able to talk her out of it."
The arrest comes after two other British-Iranians were detained in recent weeks.