John Kerry: I have not been contacted by the FBI over new Clinton email review
US Secretary of State John Kerry attends a donor conference -- Supporting Syria and the Region -- in central London on February 4, 2016 (AFP Photo/Stefan Rousseau)

U.S. Secretary of State John Kerry said on Sunday he had not been contacted by the FBI about new investigative steps being taken related to Hillary Clinton's use of a private email server when she led the State Department.

The FBI on Friday said it was investigating more emails in what the Democratic presidential candidate described as "deeply troubling" behavior 10 days before the U.S. elections.

"I haven't been notified of anything, no, I haven't been requested of anything, no, I'm not aware of the department being requested, and I have no further comment to make," Kerry told a news conference in Ireland.

"As an American citizen and former nominee of the party, there is a lot I'd like to say about what is going on, but I can't and I am just going to remain out of this," he added.

Clinton on Saturday challenged FBI Director James Comey to provide a fuller explanation of investigative steps he is taking related to her use of a private email server.

Comey had decided in July that the FBI was not going to seek prosecution of Clinton. But on Friday he said the agency was trying to determine whether additional emails contained classified information.

Republican presidential nominee Donald Trump, who has been reeling for weeks from the release of a 2005 audio tape in which he boasted about groping women, has seized on the FBI move as evidence Clinton is unfit to lead the country.

Kerry was in Ireland to accept the Tipperary International Peace Award, joining recipients like former South African President Nelson Mandela, United Nations Secretary General Ban Ki-moon and former U.S. President Bill Clinton.

Kerry is due to travel to London on Monday for talks on Libya that will seek to break a political stalemate over the country's U.N-backed unity government.

(Writing by Lesley Wroughton and Conor Humphries, editing by Larry King)