Indian security forces have begun an attack on a Jewish centre in Mumbai where an unknown number of people are being held hostage by gunmen. TV footage showed troops abseiling from a helicopter into the centre, and soldiers on the ground closing in. (video at link) Commandos are also clearing the last gunmen from two luxury hotels, more than a day after a series of attacks that killed 119 people and injured 300. Indian PM Manmohan Singh has vowed to track down the perpetrators. Gunmen armed with automatic weapons and grenades targeted at least seven sites in Mumbai late on...