Caulker was taken to Swansea Central police station after being arrested on suspicion of a public order offence.
The 19-year-old centre-half, who is on loan from Tottenham for the season, has not played since picking up an injury during September's defeat against Arsenal.
Taken in: Steven Caulker (right) was arrested in Swansea ciity centre
Caulker was hoping to be back in action after the international break.
Swansea have yet to comment.
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Source: Daily Mail
Source: Daily Mail