ANKARA (Reuters) - Turkey is  deeply concerned  about legal cases concerning Turkish citizens in the United States, its embassy in Washington said on Monday, adding the decision to partially resume issuing visas at U.S. and Turkish missions was a positive development. In a statement, the Turkish embassy said Turkish officials would continue to hold meetings with their U.S. counterparts in order to solve the cases in a  satisfying  manner. The statement also said Turkey had not offered the United States any assurances regarding the cases of U.S. mission workers in Turkey. It said the U.S. mission workers detained or arrested in Turkey were not held for their work, but because they were accused of  serious crimes . 