ITC Limited and Starwood Hotels & Resorts have signed agreements extending their partnership for 11 ITC Luxury Collection hotels and one hotel under the Sheraton brand. The two companies on Thursday announced three upcoming ITC hotels under The Luxury Collection brand in India. The addition in Hyderabad, in Ahmedabad and in Kolkata, will take the inventory to 15 hotels, over the next four years. Thomas Mangas, chief executive officer, Starwood Hotels & Resorts Worldwide Inc., said that Starwood was experiencing a strong growth momentum in India.