A medical issue in the crowd resulted in play being halted in the match between Cadiz and Barcelona.
Robert Lewandowski and Frenkie de Jong had put Barca 2-0 up in Saturday's game in Andalusia.
However, with Barca cruising to an easy win, play was stopped with under 10 minutes of normal time remaining.
The players waited on the pitch as it became apparent that something in the crowd was amiss, with Cadiz goalkeeper Jeremias Ledesma passing what seemed to be medical equipment to those in the stands.
After close to 20 minutes, the referee spoke with the captains of both sides, with the players taken off the field and down the tunnel.
No indication was immediately given as to when or if the match would resume.
A short statement from Barca read: "The game has been stopped due to a medical emergency with a fan in the stands. The players are going to the locker rooms."