CAIRO - Egypt's prosecutors on Tuesday opened an investigation into the death of a controversial Saudi princess after a report filed by her brother who accuses her husband, a Saudi royal, her son and daughter of killing her. "Princess Hend Al-Fassi was dead in hospital. I was prevented from paying final respects to her. The incident seems fishy. I have some proofs, which I want to bring to the attention of investigators," Sheikh Aalal Al-Fassi said ahead of an interrogation by prosecutors. He added that he had suspected her son and daughter as well as their father Prince Turki bin Abdelaziz had killed her. "The hospital also can be involved in the matter in one way or another," Al-Fassi said. Princess Hend Al-Fassi, who had lived in Egypt with her husband since the 1970s, died on Sunday in Al-Wadi Hospital in October 6th City outside Cairo after a sharp fall in her blood pressure, according to a statement from the hospital. She was 52. "When I wanted to have a final look at my sister's body in the intensive care, I was prevented by her son and the doctors in the hospital," her brother said. Meanwhile, Abdel Rahman, the son of Hend lodged a report with the Prosecution General accusing his uncle Aalal of beating and insulting him and his father, who is a half-brother to Saudi King Abdallah, in the hospital and breaking the glass window of the intensive care unit. Princess Hend was buried on Monday in a funeral attended by her relatives and Saudi Ambassador in Cairo Hesham Nazir. Al-Fassi's family and retinue have resided on two floors of a luxury hotel overlooking the Nile for 10 years. They are known for their lavish parties and extravagant lifestyle. The dead princess had repeatedly ignored court summonses to appear in connection with a theft of the jewellery worth one million, stealing $2.3 million from one of her financial advisers and holding her cook and his wife against their will.