The FBI conducted a thorough investigation and found "no ties to terrorism, " Mueller said.

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We also conducted a thorough investigation and found the allegation of underage conduct to be unsubstantiated.

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The subcommittee conducted a thorough investigation of the allegations, interviewing numerous witnesses and reviewing thousands of documents.

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According to a DHS spokesman, the Department had conducted a "thorough investigation" that found Gill "exceeded all requirements" for his job.

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"From the press reports, it would appear that the police have prematurely accused the pilots in response to public pressure and have not conducted a complete and thorough investigation of the facts, " Joel R Weiss wrote in an email quoted by the AP news agency.

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"The charges are the result of a thorough investigation conducted by the FA over the last three months, " read an FA statement.

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