Speaking to IANS, officials at Tihar jail said that Afzal Guru, convicted for his role in the 2001 parliament attack, was told on February 8 evening that he would be hanged the next morning.
"When he was told about his execution, he was cool and calm. He just expressed his wish that he wants to write a letter to his wife. The jail superintendent gave him a pen and paper," an official told IANS under condition of anonymity.
"He wrote the letter in Urdu, which was posted to his family in Kashmir on the same day," the official said.
But when IANS contacted the family, who live in Sopore, they said they are yet to receive it.
"We haven't received this letter. Maybe like the letter that we got today about his hanging, we will get it later," Yaseen Guru, Afzal's cousin, told IANS on phone.
Afzal Guru was hanged on February 9 at 8 am in the Tihar Jail complex where he had lived in a solitary cell for many years.
His family has demanded that they be allowed to conduct his last rites.
"The government will take a decision in this regard," another official told IANS.
Afzal Guru, who used to spend his time in the jail by reading and writing, has left behind many books and hand-written articles.
The family has asked the jail authorities that all his belongings should be returned to them.
"The government will have to take a decision on this issue," the official added.