Lafayette Police yesterday conducted an underage alcohol possession operation targeting people under 21 in possession of alcohol at Lafayette businesses. Four nightclubs on McKinley Street were checked during the operation.  Only 4 persons under the age of 21 were found in possession of alcohol.  One person under 21 was issued a summons for possesstion of alcohol at the McKinley Street Pub while two people at the Keg were issued summons and one person at the Keg was arrested for possession and disturbing the peace by intoxication.  Nitecaps and the Loose Caboose were checked and no violations were found.