Pakistan will hold a security review on Friday amid global calls for calm a day after the Sunni-majority nation launched tit-for-tat airstrikes against Shiite-dominated Iran. The Muslim neighbours appeared to have toned down their rhetoric overnight on Friday after regional power China offered mediation and global bodies and nations urged restraint. Political leaders and services chiefs would hold an emergency huddle on the situation, Information Minister Murtaza Solangi said. Pakistani fighter jets and drones on Thursday bombed alleged hideouts of separatists inside Iran in response to simila…