Tributes flow for 'hero' Brisbane-based singer and bus driver Manmeet Sharma

Australia's Indian community is reeling following the horrific death of a popular Brisbane-based singer and bus driver burned alive at the wheel.

Manmeet Sharma, 29, was killed when an "incendiary device" was thrown at him while he was letting passengers on at Moorooka, in the city's southern suburbs, on Friday morning.

As news of the attack hit social media, many people reacted with shock and sadness.

"It's devastating news hard to believe he was our hero. It's very big loss to Punjabi community across the world," wrote Baldev Singh Nijjar.

Commenting on another Facebook post, Rana Hardev Singh said he'd only met Mr Sharma last week.

"He told me he have a big dreams , it's unbelievable , rest in peace veer"

"That's absolutely devastating ! I don't have words to express my disgust," Harman Jolly added to the same post.