In the latest crackdown on Turkey’s pro-Kurdish opposition party, Turkish authorities on Wednesday stripped a prominent legislator and human rights advocate of his parliamentary seat and took a step toward disbanding the entire party.

Omer Faruk Gergerlioglu, a lawmaker from the People’s Democratic Party, or HDP, was convicted over a 2016 social media post which the courts deemed to be terrorist propaganda. An appeals court decision confirming the conviction was read in parliament, leading to his automatic expulsion from the house. The legislator protested the move and refused to leave parliament.

Meanwhile, an appeals court prosecutor filed a case with Turkey’s highest court, seeking the HDP’s disbandment. The HDP is accused of acting together with the banned Kurdistan Workers Party, or PKK, and with PKK-affiliated organizations, to “disrupt and destroy (Turkey’s) indivisible integrity,” according to a court statement.

The high court needs to approve the indictment before the case against the HDP can begin. Several of HDP’s predecessors were closed down over the decades for alleged links to Kurdish rebels, but were soon re-established under different names.

An outspoken critic of the human rights record of President Recep Tayyip Erdogan’s government, Gergerlioglu maintains that the trial against him was politically-motivated and aimed to silence him. He says he was unjustly stripped of his seat before the Constitutional Court had reviewed his case and has vowed not to leave parliament until the high court issues its decision.

The move to expel Gergerlioglu triggered a raucous protest in the assembly hall, with HDP legislators banging on desks and accusing Erdogan’s ruling party of an assault on democracy.

“I came here with the 90,000 votes of the people of (the northwestern province of) Kocaeli,” Gergeroglu said, addressing journalists watching the proceeding.

“I am my party’s legislator and I am not going anywhere,” he said.  HDP legislators remained in the assembly hall in a show of solidarity.

The government accuses the HDP — the third largest party in Turkey’s parliament — of links to the PKK. Dozens of elected HDP lawmakers and mayors, including former co-chair Selahattin Demirtas, as well as thousands of members have been arrested in a crackdown on the party. Erdogan’s nationalist ally recently called for the party to be closed down.