Turkish authorities are investigating some 10,000 people on suspicion of using social media to support terrorism, the interior ministry said on Saturday, part of a wide crackdown that has alarmed rights groups and some Western allies.

Turkey's ruling AK Party on Saturday submitted to parliament a package of constitutional reform proposals that would expand the president's powers, party officials said, in a move that could potentially see President Tayyip Erdogan govern until 2029.

Tayyip Erdogan accused Europe of abetting terrorism by supporting Kurdish militants and said he did not care if it called him a dictator.

Turkey dismissed a further 10,000 civil servants and closed 15 more media outlets over suspected links with terrorist organizations and Fethullah Gulen.

Turkish police on Wednesday used tear gas and water cannons to disperse hundreds of demonstrators protesting the detentions of two leading politicians.

Turkey's president hinted on Thursday that the three-month state of emergency declared following the failed July 15 coup could be extended to over a year.

Turkey's president plans to demand the extradition of the cleric accused of masterminding last month's failed coup during his meeting with U.S. Vice-President Joe Biden.

Turkey's state-run news agency says police have detained dozens at Turkey's banking regulatory agency.

Turkey issued a decree Wednesday paving the way for the conditional release of some 38,000 prisoners.

Turkey's state-run news agency says police have launched simultaneous raids on 44 companies suspected of providing financial support to U.S.-based Muslim cleric Fethullah Gulen's movement.