What was that loud sound everyone heard in Bengaluru?

People woke up to a loud sound in Bengaluru and it sparked many reactions.

Bengaluru woke up to a loud sound and that caused people to panic. People shared their concern on social media and the authorities ensured that there is nothing worth worrying about and the investigation is going on. With the lockdown being imposed, people tweeted to find the reason behind such a loud noise and many theories started to circulate. 

With reason still being unknown, people started to joke that this could be a sonic boom and sound of a growling stomach. Here are the best reactions on the internet. 

What do you think it was?