Taliban leader Mullah Mohammad Omar has been disappeared from Quetta city of Pakistan for the past three or four days," spokesman of Afghan National Directorate for Security (NDS) or intelligence agency said Monday.

"We can confirm he (Mullah Omar) has been disappeared from his hideout in Quetta for the past three or four days," Lutfullah Mashal told newsmen at a press conference.

He made the comment while earlier, officials with security agency reported killing of Taliban elusive leader Mullah Omar inside Pakistan.

According to earlier claim of NDS, Omar was killed on the way from Quetta to north Wazirustan two days ago.

However, Mashal said "we cannot confirm his (Mullah Omar) death until his body is found."

Mashal also emphasized that Taliban senior commanders have lost contact with Mullah Omar over the past four days.

The spokesman of Afghan intelligence agency also insisted that Taliban chief Omar had used to live in Quetta city of Pakistan over the past 10 years.

Meanwhile, Taliban spokesman Zabihullah Mujahid in talks with media via telephone from unknown location rejected the reported death of Mullah Omar, saying he (Mullah Omar) is alive and leading his Mujahidin (holy warriors) against foreign troops in Afghanistan.