China has blocked access to WhatsApp messaging throughout its territory, security experts confirmed to The New York Times. In recent months, the social network belonging to Facebook was presenting brief interruptions in the service, preventing users from sending text or multimedia messages.

According to Nadim Kobeissi, a cryptographer at Symbolic Software, a Paris-based research firm, said the country has just implemented an absolute blockade of WhatsApp.

He commented to The Verge portal that the Chinese government probably did not block the messaging platform because it had not updated its firewall to detect and block the NoiseSocket security protocol used by WhatsApp. However, with this lock the app would have been censored forever.

China is a country that blocks several web pages through firewall. A few months ago, began blocking the use of VPN throughout the country, with the intention that no one could evade the firewall. One of the affected was the social network Facebook, blocked since 2009.

With WhatsApp blocking, Facebook’s only remaining share in China is the Colorful Balloons app that has been quietly released in August.