CHENNAI, India — Terror and Mumbai have become as inseparable as Siamese twins, at least since 1993, when 250 people died in bomb attacks carried out as a revenge for the demolition of the ancient Babri Mosque by Hindu fanatics.

In 2006, more than 180 people died when bombs planted in seven suburban railway stations and several trains went off.

Between 1993 and 2006, there were many explosions, but the carnage Nov. 26 was executed with unusual precision. Nearly 200 people — including some top and able police officers — lost their lives and several hundred were wounded.