KARACHI, Pakistan The top US and Saudi diplomats on Saturday telephoned their Indian and Pakistani counterparts as part of stepped-up efforts to de-escalate heightened tensions following retaliatory air strikes between the two nuclear-armed nations. Pakistani Foreign Minister Ishaq Dar briefed his Saudi counterpart Prince Faisal bin Farhan bin Abdullah on the current situation in the region after Pakistan launched Operation Bunyan-un-Marsoos, or Iron Wall, firing Al-Fatah missiles in response