Three storm chasers were among the nine people killed in the most recent tornadoes to strike Oklahoma, CNN reports.
Tim Samaras, 55, and his 24-year-old son Paul died along with 45-year-old Carl Young whilst chasing a tornado in El Reno, relatives said.
Writing on Facebook, Jim Samaras confirmed that the trio had been killed:
Thank you to everyone for the condolences. It truly is sad that we lost my great brother Tim and his great son, Paul.
The men who died made a living from researching and recording extreme weather.
More top news
Philip Wilson, the Archbishop of Adelaide, is the most senior member of the Catholic church to be convicted of covering up child sex abuse.
New legislation will mean that only cleaner fuels and stoves will be sold for domestic heating.
Many people do not know the meaning of “best before” - when food might not be at its top quality after this date, but is still safe to eat.