ISLAMABAD, Oct 17 (INP): Foreign Minister Khawaja Asif has called on the United States to exercise restraint on drone strikes at a time when attempts are underway to revive Afghan-Taliban peace talks. In a TV interview, the foreign minister expressed the hope that the four-nation moot in Muscat, Oman to find ways of reviving peace talks with Afghan Taliban militants would yield positive results. INP/AH/LK