The news comes a day before U.S. President Donald Trump and his Democratic challenger Joe Biden are scheduled to take part in the final presidential debate.

FBI agents reportedly began investigating the suspect in October.

The FBI fielded more than 38,000 phone and online tips during the week after the shootings on the first weekend of August, up from the 22,000 tips it typically receives on a weekly basis.

QuadrigaCX was one of Canada's largest cryptocurrency exchanges before it was shut down amid a storm of controversy in January.

Of Russian interference, the FBI director said, "we recognize that our adversaries are going to keep adapting and upping their game."

According to the Ontario Provincial Police, the force's child sexual exploitation unit received information from the Federal Bureau of Investigation (FBI) in Atlanta, relating to the internet exploitation of children.

Investigators charged the man with two counts of arranging to meet a child for a sexual purpose on the internet.

About 5,000 FBI staff are furloughed, while the rest of the 13,000-member workforce continued on the job without pay, said Tom O’Connor, president of the FBI Agents Association.

McCabe has been a frequent target of criticism from U.S. President Donald Trump.

U.S. President Donald Trump has praised "stop-and-frisk."