On December 13, 2001, five heavily-armed gunmen stormed the Parliament complex and opened indiscriminate fire, killing nine persons.
The martyrs included five Delhi Police personnel, a woman Central Reserve Police Force (CRPF) official, two Parliament watch and ward staff and a gardener.
A journalist, who was injured, died later. All five terrorists were shot dead.
A year later, four accused, including Afzal Guru, were arrested for the attack and found guilty after a trial.
Guru was hanged to death for his involvement in the Parliament attack.