A helicopter belonging to an NBC news affiliate was covering a large traffic accident in the southern California city when it crashed. The helicopter crashed as news crews were covering a collision that left at least two people dead Key points and original sources are listed below.

• A helicopter belonging to an NBC news affiliate was covering a large traffic accident in the southern California city when it crashed. The cause is currently unclear.S1

• The helicopter crashed as news crews were covering a collision that left at least two people deadS2

• Three people were killed Tuesday in a fiery crash when a US news media helicopter covering a deadly bus crash came down in a Los Angeles neighbourhood. Media in the city had scrambled to cover a deadly accident, after an SUV ploughed into a bus in the Chatswor...S3

• LOS ANGELES — A news helicopter crashed in a Los Angeles neighborhood on Tuesday and burst into flames, killing at least three people near the scene of where an SUV had slammed into a city bus, officials said. The helicopter crashed around 7 p.m. near a one-st...S4

• The helicopter crashed around 7 p.m. near a one-story commercial building in the neighborhood of Chatsworth in the San Fernando Valley.S5

• Descrease article font size Increase article font size A news helicopter crashed in a Los Angeles neighborhood on Tuesday and burst into flames, killing at least three people near the sceneS6

• NBC4 Los Angeles said the helicopter belonged to the station. The authorities did not immediately confirm how many people were aboard.S7

• At least one person has been killed following a helicopter crash in Los Angeles.S8