NEW DELHI, Oct. 12 -- For some, India Gate was a Sunday sightseeing stop. For others, Connaught Place was a lunch destination. But barricades, road diversions and police restrictions disrupted plans for visitors, as security was tightened across New Delhi. Groups of visitors from Bihar, Nigeria and the United States arrived at the India Gate but were asked to leave, with police citing security reasons. Sanjay Kumar from Bihar said, "I had come for an excursion to the India Gate on Sunday but the police told me that I could neither sit on the lawns nor walk up to the monument." The restrictions also disrupted plans for visitors who had travelled to the Capital for other reasons. Ravi Prakash Gupta, 23, a national-level bodybuilder who won a bronze medal at the Khan Classic National Bodybuilding Competition on Saturday, said his journey to Delhi had already been disrupted after his scheduled train was cancelled. He eventually travelled by bus. On Sunday, Gupta and his friend Vishwajeet Singh, 24, planned to visit a restaurant in Connaught Place but had to change their route. "Our train, which was scheduled for Delhi on Saturday, was cancelled, so I took a bus. We were planning to visit a restaurant in Connaught Place, but police asked us to take a longer route. We were also told that the restaurant might be closed," Gupta said. For visitors unfamiliar with the city, the curbs meant navigating unfamiliar roads....