It's been a horrific few weeks for the state of Oklahoma. There's been tornadoes that have killed dozens and dozens of people, including five people this past Friday.

But, three others that devoted their entire lives to chasing the deadly storms have also been named as victims.

Tim Samaras, his son Paul Samaras and Carl Young were killed Friday while following a tornado in El Reno, Okla., relatives told CNN on Sunday. Their work tracking tornadoes was featured on the former Discovery Channel show 'Storm Chasers'.