Former National Security Adviser Maj Gen (Retd) Mehmood Ali Durrani has said that he was first in the Pakistani government to be alerted by a US official about the 'threatening call' from Indian External Affairs Minister Pranab Mukherjee to President Asif Ali Zardari being a fake.

"I received a text message from a high American official that the Indian minister has not called President Zardari," said Durrani who was sacked last week for not taking Prime Minister Yousuf Raza Gilani into confidence before confirming that the lone captured terrorist of the 26/11 Mumbai attacks Ajmal Kasab is a Pakistani.