Fire alarm in the Richard Strauss Tunnel in Munich on 07 10 2019

890/5000
Today, during the drive through the Richard Strauss Tunnel in Munich in the afternoon, there was a fire alarm in the tunnel with full closure.
I was one of the last vehicles, because I did not see the closing of the tunnel. Only in the video I saw that the traffic light had switched to yellow.
There were several announcements in German and English from the tunnel speakers and then also over the radio via FM.
After stopping and getting off, you immediately saw that nothing was wrong.
There was no fire department from behind. After 10 minutes, the opposite direction
already open again. And after 16 minutes were from behind again
Cars left in the tunnel and you could continue slowly.
The warning system of the tunnel is solved in any case very well!
Dashcam: AZDOME GS63H