Afghanistan ( (listen); Pashto/Dari: افغانستان, Pashto: Afġānistān, Dari: Afġānestān), officially the Islamic Republic of Afghanistan, is a landlocked country located in South-Central Asia. Afghanistan is bordered by Pakistan in the south and east; Iran in the west; Turkmenistan, Uzbekistan, and Tajikistan in the north; and in the far northeast, China. Much of its 652,000 square kilometers (252,000 sq mi) is covered by the Hindu Kush mountain range at the western end of the Himalayas, separating the Amu Darya and Indus valleys.
I did not see in our authentic books any narration supporting this claim. I discussed the claim with respected Ulama from Afghanistan who have done research on this matter. None of them confirmed this claim
Imam Ali (AS) was buried in Najaf , in Iraq, and his grave in Najaf was visited by infallible Imams, so there is no question of any other place. Nevertheless, history says that a Sayyed pious person by similar name, Sayyed Ali son of Sayyed Abu Talib (Ali Ibn Abi Talib), was buried in Afghanistan before about five hundred years from now which means 8 to 9 centuries after the martyrdom of Imam Ali (AS) . Muslims of the area saw many blessings from visiting his grave and built on his grave a big Masjid and the whole city then was called Mazar Shareef.