Unrest in Iran has killed more than 500 people, a rights group said on Sunday, as Tehran threatened to target US military bases if President Donald Trump carries out his renewed threats to intervene on behalf of protesters.

With the Islamic Republic's clerical establishment facing the biggest demonstrations since 2022, Trump has repeatedly threatened to get involved if force is used on protesters.

According to its latest figures - from activists inside and outside Iran - US-based rights group HRANA said it had verified the deaths of 490 protesters and 48 security personnel, with more than 10,600 people arrested in two weeks of unrest.

Iran has not given an official toll and Reuters was unable to independently verify the tallies.

Trump was to meet with senior advisers on Tuesday to discuss options for Iran, a US official told Reuters on Sunday. The Wall Street Journal had reported that options included military strikes, using secret cyber weapons, widening sanctions and providing online help to anti-government sources.