A key British parliamentary committee has said former Prime Minister David Cameron's military intervention in Libya was misguided and helped spur the rise of Islamic extremism there.

The House of Commons Foreign Affairs Committee said Wednesday the 2011 decision to intervene was based on "erroneous assumptions" and an "incomplete understanding" of the ramifications of removing Libyan dictator Moammar Gadhafi.

The oil-rich North African country descended into chaos after the intervention and parts of it have become a bastion for Islamic State extremists.

The parliamentary report criticizes Cameron for turning an operation designed to protect Libyan civilians in the port of Benghazi into a full-scale push for regime change.

Cameron stepped down as prime minister in July and resigned from Parliament this week.