"I can confirm the FBI is involved in the investigation, " said FBI spokesman Manuel Johnson in Phoenix.

CNN: In Arizona, suspicious package addressed to sheriff

While Johnson busied himself in attack, Manuel Fernandes did his best to disturb Arsenal's midfield with a gritty performance.

BBC: SPORT | Football | Premiership | Everton 1-0 Arsenal

Cole's dismissal had come shortly after a Glen Johnson shot had been tipped over the bar by Arsenal keeper Manuel Almunia and an Ngog header from a Gerrard corner had been cleared off the line by Gael Clichy.

BBC: Liverpool 1-1 Arsenal