Hackers broke into the internal communication system of Brazil's Foreign Ministry and penetrated the personal email accounts of several diplomats, sources from the Foreign Ministry told Xinhua on Tuesday. The email system of the ministry collapsed on Monday as a result of the attack, according to the sources. Hackers sent a malicious link to carry out the attack. Once the link is opened, a Trojan will be installed in the user's computer to gather information and steal passwords. So far, the exact number of affected accounts has not been revealed. No group has claimed responsibility. The government is investigating the attack.