JAKARTA, April 5 (Xinhua) -- The Indonesian government summoned Facebook on Thursday following a finding that part of users' data have been leaked to Cambridge Analytica, whose role in Donald Trump's presidential campaign has drawn public concerns for its alleged improper use of private Facebook data.

The summon was issued by Communications and Informatics Minister Rudiantara after communications with Facebook on the allegation.

"There were indications that our users' data have been leaked to Cambridge Analytica. Today I have the information of around 1 million (leaked Indonesian users' data)," the minister said.

He expected Facebook to give proper explanation over the finding.

The minister has threatened to shut down Facebook operation in Indonesia if such a leak is confirmed.

The warning was issued following revelations that Facebook had given tens of million data of Facebook users to Cambridge Analytica to help Donald Trump, who eventually won the U.S. presidency.

Reports said Facebook had admitted the leak, affecting roughly 87 million users, mostly in the United States with over 70.6 million.

Indonesia was ranked third with more than 1 million users affected after the United States, and the Philippines with 1.1 million users.

Indonesia has shut down the operation of Telegram, an internet messaging application over security concerns.

The country has enacted a law on protection of personal information, obliging social media operators to comply with it. Violation of the law would carry penalties of up to 12 years in prison and a fine of up to 12 billion rupiah (about 837,000 U.S. dollars).