People from San Diego to Los Angeles to Las Vegas reported seeing a large, greenish, fiery object shooting across the sky Wednesday night.
There is no word yet on exactly what it was.
"I saw something that looked like a falling star but it must have been a fireball in the atmosphere," a witness told NBC4. "It was huge. It had a green glow in front of it and a white tail. It like green fireworks going across the sky."
Local news from across Southern California
Witnesses said they saw the fireball around 7:30.
"I was talking to my friend and said, Oh My God, I'm watching something. I don't know what it is? It's not a UFO, but it's something falling from the sky, like on fire," said Marty Styles.
The FAA and the National Weather Service said they have received many calls. A spokesman from the National Weather Service said it "sounds" like it was a meteor.
It's not unusual for a meteor to appear to change colors, experts said. Many meteors are out there during the day. But, if they are seen at night, they appear much more dramatic.
At first there were concerns that the fireball may have been an aircraft. But that does not appear to be the case.
If you have any photographs of the flying object email NBCLA at Isee@nbcla.com.