Barcelona president Joan Laporta had his laptop stolen during Wednesday night's Champions League semi against Manchester United.
Barca reported the theft to the police on Thursday morning and they are investigating the break-in.
The laptop was stolen from the club's central offices in the Nou Camp.
"The individual was caught on the CCTV cameras," read a statement from the club.
"Barcelona consider this a very serious act and warn that they will take legal action regarding any illicit use of the information on the laptop."