A suspicious envelope sent this week to Tunisia's Presidency did not contain any toxic, narcotic, dangerous or explosive substance, the country's Public Prosecutor has said. The presidency said on Thursday that the office manager for Tunisia's president had suffered a headache and short-term vision loss after opening the envelope on Monday. Reports on social media on Wednesday said President Kais Saied had been sent a letter that may have contained poison. However, the Public Prosecutor said in a statement on Friday that tests carried out on the suspicious envelope by a technical team had found that it did not contain…