Islamic State has released an audio clip purporting to be a posthumous statement by a militant who killed 27 people in a suicide bombing attack on a Kuwait mosque on Friday.
The statement consisted largely of Koranic verses and was released on social media channels used by Islamic State, Reuters reported.
The speaker criticises Shi'ite Muslims and says they can expect revenge for what he terms insulting Islam.
Kuwaiti authorities have identified the bomber as Fahd Suliman Abdul-Muhsen al-Qabaa, a Saudi. Reuters was unable to immediately verify the authenticity of the statement.
More top news
The move is seen as acceptance from Donald Trump that he is likely to be impeached.
The President says he has made all preparations for the listing to come into effect, but will delay the move for now.
The two party leaders involved in angry exchanges in final TV debate of the General Election campaign.