Three relatives of the late al-Qaida leader Osama bin Laden were among four people killed when a private jet crashed on landing in southern England, British police confirmed Saturday.

The Hampshire Police force said formal post-mortems were still being conducted, but the victims were believed to be “the mother, sister and brother-in-law of the owner of the aircraft, all of whom are from the bin Laden family.” It said all three were Saudi nationals who were visiting Britain on vacation. The plane’s Jordanian pilot also died.