Nationwide protests in Iran, fueled by economic hardship and calls from exiled Crown Prince Reza Pahlavi, have intensified, leading to a government-imposed internet and phone blackout. Demonstrators are chanting anti-government slogans, with some expressing support for the return of the monarchy. Authorities have accused "terrorist agents" of the US and Israel of inciting violence, while rights groups report dozens of deaths and thousands of detentions amid a crackdown. US President Donald Trump has warned Iran against violent suppression of protests.