The website of the Indian Central Bureau of Investigation (CBI) was hacked by a group identifying itself as the 'Pakistani Cyber Army ', which also claimed to have hacked the server of the National Informatics Centre (NIC) website. The investigation agency confirmed that its website was hacked and that they had no idea who was behind this cyber attack. A CBI official told IANS Saturday: "Our website was hacked last (Friday) night by unidentified hackers. They had posted a message which read 'Pakistan Zindabad' there. Although, our website is not hacked often but now that it has happened, a meeting is being held in a couple of hours and we will decide the due course of action. As of now, we have no idea who is behind this." While the banner and index of the website, which was hacked Friday night, is intact, the group has posted a message, mocking India's premier investigating agency. The website was down Saturday morning as well. The message read: "This attempt is in response to the Pakistani websites hacked by 'Indian Cyber Army '. We told u before too...we are sleeping but not dead." "Back off kids or we will smoke ur doors off like we did before...let us see what your investigating agency so called CBI can do," it further said. The group also said that they had hacked into the root server of the National Informatics Centre (NIC), which maintains most of the government websites. The hackers concluded their message with "Pakistan Zindabad".