China has closed more than 13,000 websites since the beginning of 2015 for breaking the law or other rules and the vast majority of people support government efforts to clean up cyberspace, state news agency Xinhua said on Sunday.

The government has stepped up already tight controls over the internet since President Xi Jinping took power five years ago, in what critics say is an effort to restrict freedom of speech and prevent criticism­ of the ruling Communist Party, according to news agency Reuters.

The government says all countries regulate the internet, and its rules are aimed at ensuring national security and social stability and preventing the spread of pornography and violent content.

A report to the on-going session of the standing committee of China’s parliament said the authorities had targeted pornography and violence in their sweeps of websites, blogs and social media accounts, Xinhua said.

As well as the 13,000 websites shut down, almost 10 million accounts had also been closed by websites, it added. It did not give details but the accounts were likely on social media platforms.