3:31 PM: Guy sent us that photo of a burning RV even before we saw the “car fire” callout for 1st/Olson. Via scanner, we’re hearing a traffic alert for the east end of Roxbury. We’re also hearing the fire’s out but foam was used to fight it and so the hill needs some cleanup before it’s safe for traffic. No word yet on any injuries. Avoid the area for a while.

3:41 PM: Police report that SDOT has arrived on scene.

4:11 PM: SDOT tells us via Twitter that its dispatch reports the area now clear.

ADDED TUESDAY: We finally got some information from SFD. Spokesperson Kyle Moore says the carburetor caught fire while the RV’s owner was driving it; he pulled over and apparently left to get help, so when SFD arrived, no one was there, and they were worried someone was trapped inside, but they found it empty. But the RV caught fire again while it was being towed away – which explains a later “car fire” call nearby. No injuries.