HAVANA (AP) — Cuba’s government said Wednesday it has launched a probe into how hundreds of thousands of customer cellphone numbers fell into the hands of a U.S. government program that used them to secretly set up a mobile-based, Twitter-like social network on the island.

An Associated Press investigation revealed last week that the U.S. Agency for International Development program used the data to build a subscriber base for the platform, dubbed ZunZuneo, with the idea that it could be used to stir unrest.