A massive security drill is underway with choppers flying over the heart of Delhi ahead of the G20 summit next month.

Life-size cutouts of langurs have sprung up in several parts of New Delhi over the last few days as officials look to prevent the smaller rhesus monkeys from playing spoilsport during the G20 summit that will take place next week.

In their quest to make the mega G20 Summit an unqualified success, authorities and people in Delhi are taking a series of usual and rather unusual steps.