New Delhi, Sept. 26 -- India and Bangladesh are yet to finalise dates for a possible visit to New Delhi by Prime Minister Tarique Rahman, people familiar with the matter said against the backdrop of a busy diplomatic calendar on the Indian side that has left a very narrow window for a trip. The Bangladeshi side opted not to take up India's invitation to attend the recent Brics Summit in New Delhi, reflecting the continuing strains in bilateral relations. Rahman had been extended invitations for both a bilateral visit and for the Brics Summit in his capacity as the current chair of the Brics grouping. There have been no substantial engagements since then on arranging dates for the bilateral visit, the people said on condition of anonymity. The Bangladesh side's decision to attach conditions to the visit - including the extradition of former premier Sheikh Hasina and the creation of a "propitious environment" for the trip - also have not gone down well in New Delhi. "There is an invitation for a bilateral visit and it is for the Bangladesh side to take a call," one person said. "As of now, there is no finality or clarity on dates for a visit." A range of key issues remain to be addressed by the two sides, including the easing of restrictions on trade through land borders, access to key land and sea ports for transit of goods and the renewal of the Ganga Waters Treaty that is set to expire in December, the people said....