Health and Human Services Secretary Robert F. Kennedy Jr. said his department's report investigating an increase in autism rates will be released next month.

"We have will announcements as promised in September, finding interventions, certain interventions now that are clearly or almost certainly causing autism. We're going to be able to address those in September," he said.

Kennedy has said he expected to have a report by the fall, but earlier this year, National Institutes of Health Director Dr. Jay Bhattacharya told CBS News that it will take longer for research to be completed.

The number of autism diagnoses in the U.S. has increased in recent years, according to a new Centers for Disease Control and Prevention report that found that 1 in 31 children born in 2014 were diagnosed with

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