After Andhra Pradesh Police, the state secretariat has also been hit by a cyber attack, officials in Amaravati said on Wednesday.
Some computers at the state secretariat at Velagapudi were hacked, officials said.
The Information Technology department identified at least 20 computers in the government complex, which were affected by the cyber attack.
The experts from the department were making efforts to retrieve the data and re-write the CDs to clear the virus. Officials said wherever necessary new hard disks would be installed.
The IT department has received complaints about hacking only from the Revenue Department. The experts were trying to find out if computers in other departments were also affected by the virus.
The IT department was also briefing officials of various departments on the measures to be taken to protect their systems from hacking.
On May 13, a section of computers of the Andhra Pradesh Police Department were affected by a global cyber attack.
This also comes a day after actor-politician Pawan Kalyan released a statement that his Twitter account had been hacked.
"Janasena chief Pawan Kalyan's official twitter account has been blocked. We believe it has been hacked. After checking with experts, severe action will be taken," the statement from Kalyan's party Janasena said.
The process to recover his account, which has nearly 2 million followers on the social networking site, is underway, the statement added.