DUBAI, Dec 3 (Reuters) - President Ebrahim Raisi on Saturday hailed Iran's Islamic Republic as a guarantor of rights and freedoms, defending the ruling system amid a crackdown on anti-government protests that the United Nations says has cost more than 300 lives.

A top state security body meanwhile said that 200 people, including members of the security forces, had lost their lives in the unrest, a figure significantly lower than that given by the world body and rights groups.The protests, in their third month, were ignited by the death of 22-year-old Kurdish woman Mahsa Amini in the custody of morality police enforcing strict mandatory hijab rules.The demonstrations have turned into a popular revolt by furious Iranians from all layers of society, posing one of the boldest challenges to the clerical leadership since the 1979 revolution.

Meanwhile, a social media video appeared to show authorities demolishing the family home of Elnaz Rekabi, a climber who competed in an international contest without a headscarf in October. Rekabi later she had done so unintentionally, but she was widely assumed to have expressed support for the protests.