U.S. President Donald Trump said on Sunday he plans to speak with billionaire Elon Musk about restoring internet in Iran, where authorities have blacked out services for four days amid ongoing anti-government protests.

At least 538 people have been killed since demonstrations began two weeks ago, according to figures from the U.S.-based Human Rights Activists News Agency.

Iran's anti-government protests enter day 13 with reported death toll of 51, including 9 children, as demonstrations spread nationwide against the regime.

Protests in Iran are intensifying due to the country's struggling economy, putting pressure on its theocracy as it has shut down the internet and telephone networks.

Iran entered a 12th consecutive night of widespread anti-government protests as authorities imposed a nationwide internet shutdown, drawing international attention and sharp criticism from exiled opposition figure Reza Pahlavi.

Iran protests spread to 180 cities as authorities allegedly use lethal force against demonstrators, with Human Rights Activists in Iran reporting 65 killed and 2,300 arrested.

Iran's parliament speaker warned the U.S. military and Israel would be "legitimate targets" if America strikes the Islamic Republic, as threatened by President Donald Trump.

Tehran has imposed a nationwide internet blackout as protests continue to spread across Iran. SCOTT SIMON, HOST:

Iranian protests sparked by a currency collapse evolved into a broader uprising demanding regime overthrow, with demonstrators torching government buildings across provinces.