More than 1,000 people attended a rally of a pro-Kurdish, opposition party in Istanbul to protest against the abolition of immunity of some Turkish members of parliament.

Turkey's parliament last month approved amendments to the constitution that clear the way for the prosecution of nearly 140 legislators, many of them from the People's Democratic Party, or HDP.

HDP co-chair Selahattin Demirtas said Sunday that "in the coming days our trial is going to start. We are not afraid to be on trial but it is our right to expect to be judged by a real judicial authority."

The amendment was proposed by the ruling Justice and Development Party after the president accused the HDP of being an arm of outlawed Kurdish rebels and demanded their prosecution on terror-related charges.