A bomb hidden in a microphone killed an Afghan provincial governor on Tuesday as he made a speech at a mosque after Eid prayers in Logar, close to the capital Kabul, officials said. \"This morning, governor Arsala Jamal was delivering a speech after Eid prayers when he was killed by a bomb planted in the microphone,\" Logar provincial governor spokesman Din Mohammad Darwish told AFP. \"Eight other people have been wounded.\"