A group of around 50 people forced their way into Sporting Lisbon's training centre on Tuesday and assaulted players and staff. "We can not in any form be associated with acts of vandalism and aggression toward players, coaches and staff of the professional football department, nor with attitudes which constitute the practice of a crime". The perpetrators of these incidents are not fans of football.
Sporting Lisbon failed to qualify for the Champions League following a 2-1 defeat at Maritimo, allowing their bitter rivals Benfica to leapfrog them into second place.
One video showed a group of masked men walking down the road near the Alcochete training ground just outside Lisbon, and another showed clothes strewn across a changing room at the complex while an alarm sounded.
The players were preparing for Sunday's Portuguese Cup final, where they take on Alves, when the alleged attacks took place.
The Primeira Liga side have "vehemently condemned" a section of their own supporters who attacked players and staff at the club's training facility, injuring forward Dost and others in the process.
"Sporting is not this, Sporting cannot be this", the club said in a statement.
"This is not and can not be Sporting", it added.
In April, De Carvalho claimed he was suspending 19 of the first-team players following their Europa League exit at the hands of Atletico Madrid, although he later appeared to back down.