Southend have suspended winger Jemal Johnson for 14 days.
The npower League Two club have launched a review into Johnson's conduct after the 26-year-old American was arrested outside a nightclub in Ilford last month.
A statement from the club read: "The player will not be considered for selection or take part in training while the review is under way."
Johnson joined the Shrimpers in July following spells with Blackburn, Wolves and MK Dons.
He has started two matches this season and made five appearances as a substitute.