Azerbaijan on Wednesday barred 31 Turkish nationals, including an opposition lawmaker and party leaders, from entering the country, escalating a rare dispute between the close allies over restrictions on Islamic headscarves in schools.
Tensions flared after Azerbaijan introduced school uniform rules last month barring additions deemed incompatible with secular education.
Although the rules do not explicitly mention headscarves, girls wearing hijabs have reportedly been turned away from schools, sparking protests.
The foreign ministry in Baku said those blacklisted had used social media and online platforms to make statements "targeting the sovereignty, national security, constitutional order, people and leadership of the Republic of Azerbaijan."
It said they have called "for the violent overthrow of the government, as well as violence motivated by religious radicalism and the incitement of religious hatred and hostility."
The statement did not cite specific posts or detail allegations against individuals.
The list includes Fatih Erbakan, leader of Turkey's New Welfare Party, Omer Faruk Gergerlioglu, an opposition DEM Party lawmaker, and Yahya Ugras, deputy chairman of the HUDA PAR party.
Journalists, bloggers, religious writers and a former official of President Recep Tayyip Erdogan's ruling AKP also feature on the list.
Further "appropriate measures" would be considered, the ministry said.
The decision follows Baku's announcement Friday that it had charged Turkish newspaper columnist Celal Ciftci with advocating a violent coup and promoting religious extremism, and had requested assistance from Turkish authorities.
Erdogan adviser Oktay Saral criticised the restrictions on hijabs in Azerbaijani schools, prompting President Ilham Aliyev's ruling party to accuse Turkish figures of meddling in Azerbaijan's domestic affairs.
The Turkic-speaking allies enjoy close political and military ties, describing their relationship as "one nation, two states."
An ex-Soviet republic, Azerbaijan is a mainly Shiite Muslim country, but after decades of Soviet rule it emerged as one of the most secular states in the Muslim world.