Tehran said Monday that scientist Sirous Asgari, one of more than a dozen Iranians behind bars in the United States, is set to return to the Islamic republic within days. Asgari was accused by a US court in 2016 of stealing trade secrets while on an academic visit to Ohio. The academic told British newspaper The Guardian in March that the Immigration and Customs Enforcement agency was keeping him in a detention centre in Louisiana without basic sanitation and refusing to let him return to Iran despite his exoneration.