The United Nations envoy on Middle East peace, Nickolay Mladenov, on Thursday expressed deep concern over a surge in tensions and violence around Jerusalem's Old City. “I call on all concerned parties to de-escalate the situation and on moderate voices to speak up against those who try to fuel tensions,” Mladenov said in a statement published on his website. He welcomed the commitment of Prime Minister Binyamin Netanyahu to uphold and respect the status quo at Jerusalem’s holy sites, and Palestinian Authority (PA) chairman Mahmoud Abbas's condemnation of violence, specifically the deadly attack on two Israeli policemen last Friday. “I...