The announcement came a day after Taliban envoys appeared before reporters to give a U.S.-demanded statement that they did not want to plan or launch attacks on other countries from Afghan soil, and were open to talking with other Afghans....
However, the Taliban representatives also told reporters that their group would continue fighting NATO and Afghan troops inside Afghanistan even as the U.S. and Taliban delegations explore the possibility of peace talks. In keeping with that statement, the Taliban asserted responsibility on Wednesday morning for a rocket attack on a large U.S. base in eastern Afghanistan that killed four American troops.
June 19, 2013
"... over a security agreement that would regulate the presence of U.S. troops here beyond 2014, apparently angered by the U.S.-backed initiative to start formal peace talks with the Taliban in Qatar."