Villarreal's La Liga match at home to Celta Vigo was suspended shortly before the final whistle when a smoke bomb was thrown on to the pitch on Saturday.
The players, some of whom were clearly suffering from the effects of the smoke, left the pitch and the fans quickly left the stadium, with many covering their mouths and noses.
It was not immediately clear whether the match would continue.
Image: Tomas Pina of Villarreal reacts after a tear gas canister is thrown in the stands during the La Liga match between Villarreal CF and RC Celta de Vigo at El Madrigal in Villarreal on Saturday
Photograph: Manuel Queimadelos Alonso/Getty Images