Two fans dressed as the Teenage Mutant Ninja Turtles ran onto the pitch after Edinson Cavani fired PSG into a 3-1 lead at Roazhon Park.
Dani Alves joined in with the pair by motioning to pull a sword from his back, before Kylian Mbappe was hugged by one of the costumed intruders.
The bizarre episode is thought to relate to the 'Donatello' nickname that has been given to Mbappe by his team-mates, after the Ninja Turtle of the same name.
