CAIRO — The government on Tuesday accused the nonprofit group Human Rights Watch of breaking the law, violating Egypt’s sovereignty and insulting the judiciary after it issued a report criticizing top officials for the repeated mass shootings of Islamist demonstrators last summer.

The allegations echo charges that Egypt has used to jail or sentence dozens of activists, aid workers, journalists and opposition figures in an escalating crackdown on political dissent.

Human Rights Watch “does not enjoy any legal status that may allow it to operate in Egypt,” the government said in a statement responding to the report. “Conducting investigations, collecting evidence and interviewing witnesses without any legal backing are activities that constitute a flagrant violation of state sovereignty under international law,” the statement added. It called the report a “flagrant intervention in the work of the national investigative and judicial authorities, and an attempt to impinge upon the independence and integrity of the Egyptian judiciary.”

The government also said that Human Rights Watch had issued the report “in parallel with dubious moves by the terrorist organization and its supporters” — a reference to the Muslim Brotherhood, the Islamist group that sponsored Mohamed Morsi, the ousted Egyptian president — “with a view to carrying out further acts of violence and terrorism against the Egyptian state and innocent civilians.”