Turkish police on Wednesday arrested the head of Turkey’s doctors’ union after she called for a probe into the army’s alleged use of chemical weapons against Kurdish militants, prosecutors said. Sebnem Korur Fincanci was being detained on “terror propaganda” charges, said the prosecutor’s office. Turkey has rejected the allegations made in media outlets close to the outlawed Kurdistan Workers’ Party (PKK) that its army was using chemical weapons in operations in northern Iraq. Fincanci, head of the Turkish Doctors’ Union, said she had examined video images and told AFP last week that she had o…