The drummer was with the band for six years and featured on hit album The Black Parade before leaving in 2010.
My Chemical Romance have said their longest-serving drummer Bob Bryar has died aged 44.
A spokesperson said on Sunday: « The band asks for your patience and understanding as they process the news of Bob’s passing. »
It gave no details on how he died.
Bryar played on 2006 album The Black Parade, the concept record that made them a posterchild for the ’emo’ rock genre – even though the band rejected the label.
