A teargas canister thrown onto the pitch delayed Villarreal's La Liga football match at home to Celta Vigo.
Celta were leading 1-0 at the Madrigal and there were about three minutes left when the canister landed on the turf shortly before the final whistle.
A thick cloud of white smoke spewed out, delaying play by about half an hour.
The match was eventually restarted in an almost empty arena, Celta scoring again to win 2-0, Villarreal missing a chance to close to within a point of fourth-placed Athletic Bilbao.