Senior Tihar Jail officials who oversaw the entire preparation for hanging of Guru said he was "very peaceful" and "calm" during the final moments and did not appear repentant.
"He was very peaceful and calm during the final moments. He looked very composed," a top Tihar Jail official told PTI.
The official said Guru, who was lodged in Jail No.3 of the prison, was informed about his impending execution last evening and looked a "little shaken" thereafter.
A resident of Sopore in north Kashmir, 43-year-old Guru was executed at 8 AM near Jail No.3 in a top-secret operation.
A magistrate, a doctor and senior prison officials were present during his execution.
Another official said Guru was woken up at around 5 AM and was served tea. He offered Namaz immediately after getting up. "He was taken to the gallows at 7:30 AM," the official said.
Asked whether he was remorseless in his final moments, Director General of Prisons Vimla Mehra said, "He was happy and healthy. That answers your question."
A doctor carried out a health check up of Guru before he was taken to gallows near his cell. Mehra said normal procedure was followed in the hanging.
His body was buried inside the prison complex soon after his execution. "He (Guru) was buried near Jail No.3 with full religious rites," said another Tihar Jail official.
A Maulavi performed religious rites.
Guru spent over 10 years on death row in the Tihar prison after being convicted in the audacious attack on Parliament in 2001.