U.S. prosecutors have charged two Virginia brothers arrested on Wednesday with allegedly conspiring to steal sensitive information and destroy government databases after being fired from their jobs as federal contractors.

Twin brothers Muneeb and Sohaib Akhter, both 34, were also sentenced to several years in prison in June 2015, after pleading guilty to accessing U.S. State Department systems without authorization and stealing personal information belonging to dozens of co-workers and a federal law enforcement agent who was investigating their crimes.

Muneeb Akhter also hacked a private data aggregation company in November 2013 and the website of a cosmetics company in March 2014.