The English Football Association has warned fans against using a derogatory term for Jews in chants at matches.

Variations of "Yid" have often been hurled by rival supporters of Premier League club Tottenham.

The FA says the abuse has been "clouded" by fans of Tottenham, which has traditionally drawn a large fan base from the Jewish communities in London, calling themselves the "Yid Army."

But on its website, the FA says it's hard to determine which fans are using "Yid" in an "intentionally offensive manner."

English football leaders add that "rules on acceptable behavior and language need to be simple."

Determining that using "Yid" is inappropriate at matches, the FA is encouraging fans to avoid using it in "any situation" or risk criminal prosecution.

for the attack. The security officials spoke on condition of anonymity because they were not authorized to speak to journalists.

Gaddafi was killed after eight-month uprising that descended into a civil war in 2011. Since then, successive Libyan interim governments have failed to impose law and order. The country remains held hostage by unruly militia forces initially formed to fight Gadhafi. The militias, which have huge stockpiles of sophisticated weaponry, now threaten Libya's nascent democracy.

Car bombs and drive-by shootings since the end the civil war routinely kill security officials in Benghazi, the birthplace of the uprising.

Tawfiq Breik, a lawmaker with the liberal-leaning National Forces Alliance, said that the attacks will continue as long as Libya lacks a strong national army and police.

"Even with so many officials assassinated, no one held accountable," Breik said. "No one arrested. The state is disabled."