Turkish philanthropist Osman Kavala, jailed since 2017 on a charges of seeking to overthrow the government, is seen at an unspecified area in this undated handout photo received by Reuters, 26 October 2021; Credit: Anadolu Culture Centre / Handout via Reuters

ANKARA (Reuters) - A European human rights watchdog told Turkey on Friday it was preparing "infringement proceedings" over its failure to release imprisoned philanthropist Osman Kavala, a move that could lead to Ankara's suspension from the body.

The Council of Europe's warning, issued in line with a 2019 ruling from the European Court of Human Rights (ECHR), prompted Turkey to accuse the Strasbourg-based body of meddling in the workings of its independent courts.

Last week a Turkish court ruled to keep Mr Kavala in prison, extending his four-year detention without conviction in a trial which has added to strains in Ankara's troubled relations with its Western allies.

"By failing to ensure the applicant's immediate release, the Committee [of Ministers] considers that Turkey is refusing to abide by the Court's [ECHR's] final judgment in this case", the Council of Europe statement said.

The Council asked Ankara to submit its view on the case by 19 January 2022, it said.

Ruling

The ECHR ruled in 2019 that Mr Kavala's detention was political and called for his immediate release over a lack of reasonable suspicion that he committed an offence and ruling his detention served to silence him. Turkey has not complied with the ruling.

The Council's Committee of Ministers, which oversees implementation of ECHR decisions, has repeatedly called on Turkey to release Mr Kavala in line with the ruling.

Turkey's foreign ministry criticised the Committee's move.

"[We] invite the CoE to refrain from continuing with this decision that will have the quality of interfering with the independent judiciary", it said.

Osman Kavala's trial has been criticised as politically motivated and symbolic of a crackdown on dissent under President Tayyip Erdogan. The government rejects this and says Turkey's courts are independent.

Last month Erdogan threatened to expel the ambassadors of ten countries, including the United States, Germany and France, after they echoed the ECHR ruling that Mr Kavala should be freed.

The Council of Europe, established after World War Two, has limited powers. Its Committee of Ministers is composed of the foreign ministers of the organisation's 47 member states.

(Writing by Ece Toksabay and Tuvan Gumrukcu; Editing by Jonathan Spicer and Gareth Jones)