NEW YORK - A sister of Aasiya Hassan who was beheaded near Buffalo, New York - allegedly by her husband, the owner of an Islamic television station - may have been on the phone with Aasiya when she was killed, CNN reported Wednesday. Muzzammil Hassan, 44, has been charged with murder in the death of his wife, Aasiya Zubair Hassan, 37. Asma Firfirey of suburban Cape Town, South Africa, told the Afrikaans newspaper Die Burger that she was on the phone with her sister, Aasiya Zubair Hassan, last week when she heard Aasiya tell her husband to calm down, the CNN quoted the newspaper as saying. She said she heard Aasiya say the two could talk about their impending divorce the following day. Then she heard something that sounded like her sister struggling to breathe, she said. "I can only imagine how scared and emotional she must have been before she died," Ms Firfirey said in the interview, reported in English by South Africa's News 24 and quoted by CNN. Ms Firfirey sat quietly, according to media reports. She listened and waited. She knew what was happening. When the phone went off, Ms Firfirey phoned a receptionist who worked at the television station, but was reassured that all was well. She also phoned the police in Buffalo and then her sister's lawyer - all of whom were convinced that Aasiya was safe. Later, Ms Firfirey was told her sister was dead. Police have reportedly not yet uncovered the weapon used in the murder. Aasiya Hassan filed for divorce February 6, police said, and Muzzammil Hassan was served with divorce papers at the station. That night, he showed up at the couple's home, she notified authorities and he was served with a restraining order.