[custom_adv] Saoirse Kennedy Hill, the granddaughter of Robert F. Kennedy, died at the Kennedy compound in Hyannis Port, Massachusetts Thursday. She was 22. [custom_adv] Hill was the only child of Courtney Kennedy Hill, the fifth of Robert and Ethel Kennedy's eleven children. Hill's father is Paul Michael Hill, one of four falsely convicted in the 1974 Irish Republican Army bombings of two pubs. [custom_adv] Ms Kennedy Hill was the only daughter of Courtney and Paul Michael Hill. Mr Hill is one of four people wrongly convicted of an IRA pub bombing in 1974, who were collectively known as the Guildford Four. [custom_adv] No further details about her death have been released, although US media report she died of an apparent drug overdose. [custom_adv] The 22-year-old was a communications major at Boston College, according to the New York Times, and had suffered from depression. [custom_adv] In 2007, People magazine reported that police investigated a kidnapping attempt against the then-10-year-old as she walked home from playing tennis in Cape Cod. [custom_adv] Emergency services were called to the Kennedy residence in Hyannis Port, Massachusetts on Thursday. The 22-year-old was pronounced dead at Cape Cod Hospital. [custom_adv] She was the daughter of Robert and Ethel Kennedy's fifth child, Courtney. The Kennedy family has seen a number of tragedies including the assassination of Saoirse's grandfather in 1968. [custom_adv] A private funeral mass was held on Monday for the 22-year-old granddaughter of Robert F. Kennedy, who died last week after being found unresponsive at the family’s compound in Hyannis Port, Massachusetts, a family spokesman said. [custom_adv] Saoirse Kennedy Hill was laid to rest following the mass at Our Lady of Victory Church in Centerville, Massachusetts, Kennedy family spokesman Brian O’Connor said. [custom_adv] Hill was rushed to Cape Cod Hospital shortly after 3 p.m. EDT (1900 GMT) on Thursday after she was found unresponsive at the Hyannis Port estate. She was later pronounced dead.