Former Black Flag frontman Henry Rollins confirmed punk pioneer Alan Vega has died.
Henry announced the death on his website and has released a family-approved statement.
It read: "With profound sadness and a stillness that only news like this can bring, we regret to inform you that the great artist and creative force, Alan Vega has passed away.
"Alan passed peacefully in his sleep last night, July 16. He was 78 years of age."
The statement doesn't list a cause of death or say where Alan died.
Alan, born Boruch Alan Bermowitz, and Martin Rev teamed in the early 1970s to form the duo, Suicide.
The band never achieved mass popularity, but is widely regarded as a forerunner of punk and electronic music.
News of Alan's death has prompted reaction among the world of rock music.
Bruce Springsteen called him "one of the great revolutionary voices in rock and roll".
He said: "The bravery and passion he showed throughout his career was deeply influential to me.
"The blunt force power of his greatest music both with Suicide and on his solo records can still shock and inspire today. There was simply no one else remotely like him."
Red Hot Chili Peppers bassist, Flea, has tweeted a tribute.
Alan is survived by his wife Liz and son Dante.