In a decision which Amnesty International called a "crushing blow for rights in Turkey," the court in Istanbul also decided to release four other activists from custody pending the outcome of a trial, but barred them from traveling abroad. They will also have to report regularly to police.
The detentions added to the growing concerns over rights and freedoms in the country where the post-coup crackdown has resulted in more than 50,000 arrests and the dismissal of more than 110,000 from government jobs. The crackdown has netted journalists, politicians and activists. Several media outlets and NGOs have been shut down.
"This is not a legitimate investigation, this is a politically motivated witch-hunt that charts a frightening future for rights in Turkey," said Salil Shetty, Amnesty International's secretary general.
Also Read
Shetty also called on countries to put pressure on Turkey to release the activists, saying: "leaders around the world must stop biting their tongues and acting as if they continue business as usual."
Amnesty said the 10 are suspected of "committing crime in the name of a terrorist organization without being a member." Germany's government is calling for the release of the German trainer, who it identified as Peter Steudtner.
Merkel added that the German government would "do everything, on all levels" to secure his release.
Turkish media reports said prosecutors, requesting the arrests, presented as evidence records of their communications with suspects linked to Kurdish and left-wing militants as well as the movement led by US-based Muslim preacher Fethullah Gulen, who is accused of orchestrating last year's failed coup attempt.
Amnesty said accusations against Eser tried to link her to three terror organizations through her work with the advocacy group. Prosecutors had referred to two campaigns led by Amnesty, which weren't authored by Amnesty Turkey, the rights group said.
Turkey says the crackdown is necessary to weed out Gulen's followers amid a continued threat from his movement and to eradicate terror groups.
In April, Erdogan went on to win by a narrow majority a referendum on a series of constitutional amendments that will increase the powers of his office with few checks and balances and abolish the position of prime minister, a development critics fear will lead Turkey toward authoritarian rule.
"In Turkey, the judiciary is far away from being objective and independent," said Sezgin Tanrikulu, a former human rights lawyer and legislator from the opposition Republican People's Party, CHP. "It's impossible to speak o fair hearings in an environment where there is no objective and independent judiciary."
Eser is the second top Amnesty International official in Turkey to be arrested. Last month, Amnesty's Turkey chair, Taner Kilic, was arrested for alleged links to Gulen's movement.
Disclaimer: No Business Standard Journalist was involved in creation of this content