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
A widow with no surviving relatives faced a 100th birthday alone until a Facebook appeal saw thousands of cards and presents flood in.
Prince William says he would love to take Prince George to football matches, but he will have to "pass that by the missus".
A lucky couple are counting their (one million and one) blessings after a thief broke into their car but left the winning lottery ticket.