Frontman Davey Havok risks permanent damage to his voice if he doesn't rest it...

AFI have been forced to cancel the remainder of their American tour due to illness.

Singer Davey Havok has been ordered by doctors to rest his voice after it was found he was unable to sing properly. After a series of vocal warm-ups didn’t work, he was ordered to rest or risk permanent damage, reports MTV.

The band said in a statement: “We have never cancelled any shows and are deeply disappointed to have to cancel these shows. We truly regret any inconvenience to our fans.”

The affected dates are:

Orlando House Of Blues (March 9)

Houston Verizon Theater (12)

San Antonia Sunset Station (13)

Dallas Piano Center (14)

Springfield Remingtons (16)

Kansas City Memorial Hall (17)

Denver Fillmore Auditorium (19)