Radical feminist group Femen has staged a number of bare-breasted protests across Europe, as part of a Topless Jihad day in support of a Tunisian activist who has received death threats.

The Ukrainian-based group called for supporters to rally topless outside Tunisian embassies across the world. They want to rally in support of Amina Tyler, 19, who has received death threats after posting online images of herself topless.

"Viva Topless Jihad, there will be million Aminas! Our breasts are more dangerous than your stones," Femen's website reads.

Femen members were dragged away by police in Kiev as they demonstrated outside a mosque.

Bare-chested demstrators held banners reading "Free Amina" and "Freedom is not a disease" in front of the Tunisian consulate-general's offices in Milan. Activists also took to the streets also in Paris and burnt a salafists flag outside a mosque.

"The recent call of Tunisian salafists to stone Tunisian activist Amina was the last point before big women's riot," Femen said.

The group, which has carried out a number of high-profile protests across Europe, including topless marches in Paris and an ambush of Silvio Berlusconi, also called for its supporters to send topless pictures of themselves to the authorities with words of support for Tyler.

The initiative was embraced by naked Egyptian blogger Aliaa Magda Elmahdy, who made a name for herself with her naked blog postings she called a "scream against a society of violence, racism, sexism, sexual harassment and hypocrisy".

Tyler posted topless picture of herself on Facebook with the words "F**k your morals" written across her chest. She had been in contact Femen's leader Inna Shevchenko to set up a branch in Tunisia.

Tunisian imam Adel Almi, who heads the Commission for the Promotion of Virtue and Prevention of Vice, said the girl deserved to be whipped or even stoned to death while social media accounts of Femen-Tunisian fanpage were hacked by Islamist cyber-pirates.

Tyler has disappeared and rumours that she was taken by her parents to a psychiatric hospital in Tunis started to circulate.

However, her lawyer and women's right activist Bouchra Bel Haj Hmida said she was home safe with her family.