France's interior minister says he doesn't see a need for a drastic overhaul of counterterrorism and intelligence services, despite security failures before Islamic extremist attacks on Paris last year.

Members of a French parliamentary commission investigating the attacks made 40 proposals this week to prevent future violence, including a centralized counterterrorism agency. They found that several attackers had slipped past authorities' radar because of intelligence failures.

Interior Minister Bernard Cazeneuve said in a statement Friday that French intelligence has already undergone recent changes and doesn't need "a perpetual reform movement" unless there is "a guaranteed improvement in effectiveness."

He said he will discuss ideas with victims groups next Tuesday, when the parliamentary investigation report is released publicly.

Attacks on Paris in January and November of 2015 killed 147 people.