Alarm went off

[Gtsr]

Yesterday when I pressed the unlock button on remote key the alarm went off and couldn't turn it off. Luckily was close to a dealer and drove it (with the alarm on) and left car there.
Today they told car was inspected and no fault was found on the system and car was behaving well. But few minutes later they called me again and I could hear the alarm very loud so car is staying. Anybody had a similar situation? Thanks.

[Saudirick]

You havent left a tablet or phone in the car have you? I have had the alarm go off randomly due to this

[Gtsr]

No, nothing. Dealer is replacing the siren and its battery as he thinks that is the issue. Waiting now for it to finish.