Mumbai [Images] Police Commissioner D Sivanandan has said unlike Israel, which immediately reacts to any terror attacks, India lacked the killer instinct against those who carry out such attacks.

"Since thousands of years, we have been passively witnessing all terror attacks. We never went to fight with anybody. That's what our main problem is and we lack the killer instinct," he said.

"We cannot go and wage a war against Pakistan, China or anybody else. But Israel never keeps quiet. Israelis go on their flights, bombard the fellows (enemies), come back and keep quiet. But when we become aggressive, we face international pressure," Sivanandan, who has recently been appointed Mumbai's police commissioner, said.

Sivanandan was giving a power-point presentation on safety and security measures to be adopted at residential and commercial complexes in the city at a programme on Tuesday.

"So the time has come to sit and protect ourselves and we need to take utmost safety precautions in the wake of the recent audacious terror attacks," he added.