Floral tributes were paid to martyrs of the 2008 Mumbai terror attacks, with Union ministers Sushil Kumar Shinde and Sharad Pawar laying wreaths at the police memorial in South Mumbai.
Shinde and Pawar paid homage to the heroes at a function at the Police Gymkhana in Marine Lines, where a 26/11 memorial has been erected in remembrance of policemen who lost their lives fighting terrorists during the dastardly strikes.
Maharashtra Governor K Sankaranarayanan, Chief Minister Prithviraj Chavan, Home Minister R R Patil, Mumbai Police Commissioner Satyapal Singh, and family members of victims and brave-hearts, also paid floral tributes to those killed in the terror strike.
Lone surviving Pakistani terrorist Ajmal Amir Kasab, who was nabbed after the carnage was hanged in Pune's Yerawada Jail on 21 November.
Security has been stepped up across Mumbai, after Tehreek-i-Taliban Pakistan (TTP) spokesman Ehsanullah Ehsan warned of mounting attacks "in India and anywhere" to avenge Kasab's hanging.
Vital establishments, including airports and the Bhabha Atomic Research Centre (BARC), are under tight vigil after the threat.
166 people were killed when Kasab and nine of his aides unleashed terror on the country's financial capital four years ago.