A second explicit photo of a St Kilda AFL footballer has been uploaded to a teenage girl's public Facebook profile.

The Saints are attempting to contain the distribution of the photos, the first of which featured two players and was discovered this morning.

But several hours after the first image was revealed, the same Facebook account published another photograph involving a third Saints player.

The girl behind the photographs told radio station 3AW this afternoon she had 21 photos of footballers and planned to upload them all.

St Kilda said officials were liaising with Victoria Police over the first photograph, which they believe was sourced illegally. The club has not yet commented on the second picture.