"We firmly reject any insinuation of Pakistan's involvement in the attack on Presidential candidate Dr Abdullah Abdullah's convoy and allegations of seeking to "disrupt" elections in Afghanistan," Foreign ministry spokeswoman Tasnim Aslam said.
"Pakistan is deeply disappointed by these irresponsible allegations as they serve to vitiate the positive environment created between the two countries through constructive efforts over the past many months," she said.
Aslam said the allegations fall in the familiar pattern of certain elements in Afghanistan sparing no occasion to malign Pakistan and its security institutions and shifting the blame to others for their own security failures.
She said Pakistan's interests are not served by a "disruption" of Afghan elections but a peaceful election and smooth democratic transition would advance its interest, which is have a stable Afghanistan.
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"Accordingly, we remain committed to supporting all efforts for a free and peaceful election, including through enhanced security along the Pakistan-Afghanistan border," she said.
She also said Pakistan hoped that the people of Afghanistan would emerge stronger and more unified from the election and the government and people of Pakistan would continue to stand in strong solidarity with Afghan brethren at this crucial juncture.
Lashkar-e-Taiba (LeT) is a Pakistan based militant group.