4 time acoustic confirmation on unlocking

[proveg]

Last night after stopping off at the fruit market for 3 minutes, I come back to the car and and hear the unusual 4 time acoustic confirmation instead of the usual dual. That got me puzzled and I came around the car to see if there was any damage or anyone tried to break in. Nothing was visible and everything seemed in order. I tried locking and ulocking again and heard the same 4 time confirmation each time I pressed lock or unlock button. I have failed to look at the clown nose untill I had started the car. The 4 time confirmation tones had gone away immediately after I had started the car so I continued home.

Does anyone know what that was? Has the alarm gone off?
I havent heard it at all and I was right across the street.