A Russian man detained on hacking charges has told reporters that he was pressured to confess to a cyberattack on former U.S. Secretary of State, Hilary Clinton.

Yevgeny Nikulin was arrested in Oct. 5, 2016 in the Czech Republic at the request of U.S. authorities.

He stands accused of hacking the servers of several U.S. Companies, including LinkedIn and DropBox between 2012 and 2013.

Russia has also requested Nikulin's extradition, accusing him of stealing money from online WebMoney accounts.

In a letter to U.S. news site Nastoyashchoe Vremya, Nikulin said that he had been offered his freedom and U.S. citizenship if he confessed to a cyberattack on former U.S. presidential candidate Hilary Clinton.

More than 20,000 emails from the Democratic National Convention were released in July 2016, in a scandal which many Clinton supporters claim jeopardized her chances in the run-up to the U.S. presidential elections.

The cyberattack has been widely blamed on Kremlin-backed hackers.

"[They told me:] you will have to confess to breaking into Clinton's inbox for [U.S. President Donald Trump] on behalf of [Russian President Vladimir Putin],” Nikulin wrote. In exchange, his interrogators promised U.S. citizenship, an apartment and money, he said.