"We are supporting the families of six British people who have sadly died following a road accident in Saudi Arabia," a Foreign Office spokeswoman said.
"We are also helping several more British nationals who were injured in the crash," she said, without specifying how many.
Fatal accident: Two siblings die in road crash
Glasgow Central Mosque released a statement naming two of the victims as Glasgow couple Mohammad Aslam and Talat Aslam, who have five children, saying they had just completed umra, a pilgrimage to Mecca, Islam's holiest site.
Fatal mishaps: Minor among four killed in road accidents
They "were travelling in a minibus" to Medina, it said, adding: "Four members of another family from Manchester were also killed in the tragedy".
Every year, millions of Muslims flock to Mecca and Medina further south, Islam's second holiest site, to carry out the annual hajj pilgrimage or the umra.
In 2015, more than 2,000 worshippers performing hajj were crushed to death in Mecca, in the worst disaster ever to strike the annual ritual.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ