New, disturbing details in the Sandy Hook Elementary School massacre in Newtown, Conn., are expected to be released today, prompting officials to warn parents to brace themselves and shield their kids from the news as the anniversary of the deadly attack approaches.

The report, prepared by the State’s Attorney for the Judicial District of Danbury, will detail what investigators determined about the Dec. 14, 2012, shootings at Sandy Hook and at 36 Yogananda St., the home where authorities say gunman Adam Lanza, 20, shot his mother dead before driving to the nearby school and killing 20 first-graders, six educators and himself.

State’s attorney spokesman Mark Dupuis declined to comment yesterday beyond confirming the report will be made available to media about ?3 p.m. today. No press conference will be held.

Previously, Dupuis said prosecutor Stephen Sedensky III’s report will not include the entire state police evidence file on the Newtown shooting, which runs hundreds of pages.

The report was initially expected over the summer, and the projected release date was pushed back several times. Sedensky has come under pressure from authorities, including Gov. Dannel P. Malloy, to release more information as the anniversary of the Dec. 14 massacre approaches.

Sedensky has allowed victims’ relatives to review the summary report, and the superintendent of schools in Newtown advised parents to think about limiting their children’s exposure to media reports today.

Herald wire services contributed to this report.