Gardai said the victim's body was discovered at the side of a road in Tobarteascain, Ennis, Co Clare, at about 10pm on Wednesday night.
The man was in his late 20s.
Gardai said the area where his body was found has been sealed off and a forensic examination is being carried out.
COMMENT RULES: Comments that are judged to be defamatory, abusive or in bad taste are not acceptable and contributors who consistently fall below certain criteria will be permanently blacklisted. The moderator will not enter into debate with individual contributors and the moderator’s decision is final. It is Belfast Telegraph policy to close comments on court cases, tribunals and active legal investigations. We may also close comments on articles which are being targeted for abuse. Problems with commenting? firstname.lastname@example.org