MOSCOW (Reuters) -Russian state conglomerate Rostec said on Thursday it had restored normal operations at its Leonardo air booking system following what it called a "massive cyberattack from abroad".

"The cyberattack has been successfully repelled," Rostec said in a statement.

It described the incident as a Distributed Denial-of-Service (DDoS) Attack", in which the attacker floods a server with internet traffic to prevent users from accessing connected online services and sites.

Rostec gave no further information. The company controls much of Russia's weapons industry.

(Reportind by Reuters)