Idaho shooting: Two firefighters shot dead as police warn of ‘sniper fire’ on mountain

There is at least one active shooter with a high-powered rifle on the mountain, a law enforcement source has told CBS News, the BBC’s US media partner.

The shooter – still believed to be actively shooting – is hidden with heavy brush and thick trees.

And it remains unclear if there are more shooters involved.

Helicopters in the air with heat seeking technology are up over the area trying to locate the shooter, CBS adds.

But they are experiencing difficulty due to the smoke from the ongoing wild fire, which firefighters were responding to.

There are also hikers on the mountain asked to shelter in place – they are also being detected by the heat devices.

And there is an additional problem: Daylight will soon run out when the sun sets.