<p class="MsoNormal"></p>''<p class="MsoNormal"><span style="font-family: arial, sans-serif; color: #222222; background: white; font-variant-ligatures: normal; font-variant-caps: normal; orphans: 2; text-align: start; widows: 2; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial; float: none; word-spacing: 0px;">Iranian President Hassan Rouhani has said his country deeplyregrets the shooting down of a Ukrainian airliner. In a series of tweets,Iranian President Rouhani said, Armed Forces' internal investigation hasconcluded that regrettably missiles fired due to human error caused thehorrific crash of the Ukrainian plane and death of 176 innocent people.Describing this as a great tragedy and unforgivable mistake, The IranianPresident said, investigations continue in this matter to identify &prosecute this great tragedy & unforgivable mistake.</span></p><br />''<p></p>