Iran repelled a cyberattack on Saturday that disrupted the country's internet services for an hour, a telecommunications ministry official said.

"At 11:44 (0814 GMT) a distributed denial-of-service attack disrupted the internet services of some mobile and fixed operators for an hour," tweeted Sajad Bonabi. A DDoS attack involves overwhelming a target's servers by making a massive number of junk requests.

"Connections have returned to normal following the intervention of Dejfa shield," Bonabi added, referring to Iran's so-called digital fortress against cyberattacks.

He did not elaborate on the source of the attack. Bonabi is a board member at the ministry's Telecommunications Infrastructure Company, the sole provider of the country's telecommunications infrastructure.