‘Turkish police have raided an Istanbul office of the pro-Kurdish opposition party HDP and arbitrarily detained several senior officials, party officials said. The arrests come as President Erdogan called for legal action against the party’s members.

Five members of the left-wing pro-minority Peoples’ Democratic Party (HDP) were detained in a police raid on one of its offices in Istanbul, according to party representatives. Special forces reportedly took part in the raid.

Among those arrested was HDP Beyoglu branch Co-chair Rukiye Demir , Today Zaman reported. Party officials said no reason was given for the arrests.

State-run Anadolu Agency reported that the raid was part of a crackdown on urban networks of the Kurdistan Workers Party (PKK) group’s youth wing. PKK is outlawed by Ankara which considers it a terrorist organization.’

Read more: Turkish police arrest pro-Kurdish opposition politicians in raid on HDP party HQ