Romanian hacker "Guccifer" who targeted high-profile US politicians has been sentenced for 52 months in prison. Guccifer, whose real name is Marcel Lazar, pleaded guilty in May on charges of aggravated identity theft and unauthorized access of a computer. Lazar targeted former Secretary of State Colin Powell and the Bush family and was arrested on hacking charges in Romania in 2014 and was sentenced four years. He was extradited to the U.S. to face charges in March 2016. Reuters adds: Lazar has said in interviews he breached Clinton's private server at her home in Chappaqua, New York, but law enforcement and national security officials say that claim is meritless. Lazar is believed to have hacked into email accounts of about 100 victims between 2012 and 2014. They include prominent political figures such as former Secretary of State Colin Powell, a relative of former President George W. Bush and Sidney Blumenthal, a former Clinton White House aide and an unofficial adviser to Clinton. Clinton is now the Democratic nominee for president. Lazar leaked online memos Blumenthal sent Clinton that were addressed to her private email account, which was used during her time as secretary of state to conduct both personal and work business in lieu of a government account.