*Several websites of the Pakistan government have come under distributed denial-of-service (DDoS) attacks, but no data was lost or stolen. *
The firewalls were used for thwarting the attacks.
A spokesperson of the NTC said that the cyberattacks were launched against the PTCL networks and that an investigation was under way.
The authorities were trying to pin down the origin of the attacks through IP addresses, according to the spokesperson.
The ministry of information technology has called a meeting on Wednesday and the relevant departments have been asked to provide all the details, officials told SAMAA TV.