One example is Khalid El-Masri, a German citizen abducted by the CIA in Macedonia in January 2004. He was taken to a CIA black site in Afghanistan, known as the Salt Pit, for questioning under 'enhanced interrogation techniques' before he was determined to be innocent in March and eventually released in May 2004 after some additional delays. His abduction was said to be a case of mistaken identity. Germany initially claimed that it did not know of el-Masri's abduction until his return to the country in May 2004. But, on June 1, 2006, the BND (German intelligence agency) declared that it had known of El-Masri's seizure 16 months before Germany was officially informed of his arrest.