Lefthand Canyon plane crash: Four people killed in Boulder, Colorado, after accident that sparked fire and evacuation

FOUR people have been killed after a small plane crashed, the Federal Aviation Administration has confirmed.

The twin-engine Cessna P337 crashed at about 9.40am on Sunday in a heavily wooded area in Boulder, Colorado.

The crash sparked a wildfire in the Lefthand Canyon area, as reported by KDVR.

It caused authorities to issue an evacuation warning for surrounding areas.

All passengers were killed, according to the Boulder County Sheriff's Office.

However, officials have not revealed a cause for the crash.

The identities of the victims also remain unknown.

Investigators have not yet been able to closely inspect the aircraft due to heat within it from the fire, per 9News.

The fire caused by the crash burned about a half acre in heavy timber before it was controlled.

The evacuation warning was lifted at around 11.40am.

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