Sayija Sk, 47, who returned to Kolkata from London 5 months ago to visit her mother and sister, has been found dead under mysterious circumstances in a flat in New Alipore. Police believe Sayika committed suicide but her mother and sister who live in the flat say she suffered a heart attack. The cause of death can only be ascertained after the autopsy report is made and police say they found a note in which she has accused a woman in London of threatening her and demanding money, and they are not ruling out suicide. In a note Sayika says she paid back money borrowed from a woman in London but she kept on threatening her. One officer said the family is well established and they were told Sayika's father and brother live in Germany. Authorities are now investigating the case.