NEWTOWN, Conn. — A summary of the investigation into the shooting at the Sandy Hook Elementary School will be released Monday, Connecticut prosecutors said.

The report by the prosecutor who has led the investigation, State Attorney Stephen Sedensky III, will not include the entire state police evidence file, which runs hundreds of pages, according to spokesman Mark Dupuis.

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 allowed victims’ relatives to review the summary report at briefings this week and last week, and the superintendent of schools in Newtown advised parents to think about limiting their children’s exposure to media reports Monday.

The gunman, 20-year-old Adam Lanza, killed his mother at their Newtown home, fatally shot 20 first-graders and six educators at the school, and killed himself as police arrived.