According to source:
A mental fan breaks onto the pitch and throttles a linesman (Chernomorets v FC Metalist);
Ukrainian
football was rocked on Saturday as a crazed Chernomorets fan attacked a
linesman with a viscous double fisted choke-hold. With the match in
play, the action began with the referee having words with a coach on the
sidelines whilst the linesman and fourth official were in close
proximity.

Then, in a you couldn't script it fashion, what seemed
to be a supporter (or maybe it was a club official on the sidelines?)
burst onto the scene and cartoonishly wrapped two angry hands around the
linesman neck. The fan proceeded to force the linesman onto the
field with his hands still squeezing down on his wind-pipe, before he
was finally halted by a heavy-handed member of the riot police. Seconds
later more security members were also flanking the grounded assailant.

Getting the thug off the pitch was no easy matter though. With
Chernomorets's number 5, Santana, stupidly trying to act as a mediator
between the wild fan and the security men, it eventually needed seven
people in total to manhandle the man down the tunnel.