Something blew up in the employee area of the Austin City Limits Festival this afternoon -- they're saying on the news that it was probably a propane tank. No disruption of the music or injuries in the crowd, but apparently two festival employees are in the hospital in critical condition.

From an Austin blog that I won't link to because it has an incredibly irritating pop-up:

A column of black smoke billowed over ACL’s festival grounds at 2:30 p.m. as a fire erupted in a trailer behind the beverage vendor tents between the WaMu and AT&T stages.

Multiple fire engines and EMS crews arrived on the scene near the Town Lake Tavern beverage area on Lou Neff Road by 2:50 p.m.

Two people are critically injured and were taken to Brackenridge Hospital.

Others have received second- and third-degree burns, according to Assistant Fire Chief Jim Evans. He reports that, according to 911 callers, multiple trailers were on fire. A hazardous materials team also responded.

Crowds cleared a path on the service road for the fire trucks, which rolled quickly toward the blaze. Organizers stopped the music and cleared half the area in front of the AT&T stage, pushing people to the south.

By 3:10 p.m., police tape had been removed from most of the scene and the music resumed.

“Around two-thirty I heard some popping noises,” said Courtney Powell, who was watching Pete Yorn on the AT&T stage. “You’d see a little smoke, then two cops went running in that direction.”

“It took a good 15 minutes for the fire department to get there,” said Wendell Fleming, a concertgoer from College Station.

“It all took place in a working area for employees only in the back perimeter,” said Troy Officer, emergency service coordinator for the festival during a short press conference. “No patrons were ever in danger. The crowd was great, assisting officers setting up emergency tape. The immediate area around the fire was cleared within minutes.”