Mystic — Groton and New London have become sister cities with Kingston, Jamaica, a move that officials hope will foster cultural, economic and educational exchanges among the communities. The mayors of the town and city of Groton, New London and Kingston signed a memorandum of understanding during a ceremony Tuesday afternoon outside the Mystic Museum of Art along the Mystic River, as officials from the communities applauded. Groton Town Mayor Patrice Granatosky said the agreement promotes a cultural exchange and carries the potential for economic growth for the municipalities and Jamaica. Groton City Mayor Keith Hedrick said the agreement represents a "declaration of friendship" that is "a start to good things in the future."