United Nations Secretary-General Antonio Guterres on Sunday said he was “shocked” by reports of violence against protesters in Iran and called on the government to show restraint.For all the latest headlines follow our Google News channel online or via the app.Guterres “is shocked by the reports of violence and excessive use of force by the Iranian authorities against protesters,” his spokesperson Stephane Dujarric said in a statement, adding a call “to exercise maximum restraint and to refrain from unnecessary or disproportionate use of force.”Read more:Deaths from Iran protests reach more than 500, rights group says