Speaking at a press conference in Islamabad, Khan said it "will be done selectively" to supplement measures already in force to prevent militants from crossing the border into Afghanistan.
U.S. and Afghan officials have long said that militants use Pakistani territory as a base of operations for launching attacks into Afghanistan. Khaliq Ahmad, a spokesman for Afghan President Hamid Karzai, said fencing or mining the border fails to "confront terrorists in a real manner."
(AFP, Reuters)