(Reuters) - Britain's competition watchdog said on Friday social media company Facebook Inc removed 16,000 groups that were selling and buying fake reviews of various products and services, the second time the regulator had to intervene.

Facebook has also made further changes for detecting and removing paid content which could mislead users on its platforms, including the popular photo-sharing app Instagram, the Competition and Markets Authority said.

(Corrects headline, paragraph 1 to say Facebook "removes", not "suspends", 16,000 "groups", not "accounts")

(Reporting by Pushkala Aripaka in Bengaluru; Editing by Bernard Orr)