Director of National Intelligence James Clapper told a Senate committee hearing that he wouldn't be surprised if Russian hackers put child pornography on US computers.

The spy chief made his comments during a hearing into Russian cyber attacks during the US election, where he also said he was confident that Russia hacked DNC emails.

During the hearing, held by the Senate Intelligence Committee, Clapper said he believes Russia is still engaged in cyber operations and has tried to influence a 'couple of dozen' elections in different countries.

When asked how Germany, France and the Netherlands had increased security for their upcoming elections, Clapper said he could not say.

Director of National Intelligence James Clapper said Russia could put child porn on US computers during a hearing into Russian cyber attacks during the US election

Clapper said that he believes Russia made moves to support Donald Trump in the presidential election because 'he'd be easier to make deals with' than the Democrats

Clapper said, however, that much of the report must remain closed to protect sensitive sources and the methods by which they gathered information.

He said hacking conclusions were made based on 'human sources, technical collection and open source information'.

Clapper said that he believes Russia made moves to support Donald Trump in the presidential election because 'he'd be easier to make deals with' than the Democrats.

He also said he 'wouldn't put it past' Russia to plant child porn on computers belonging to US citizens, Sky News reported.

FBI Director James Comey said on Tuesday that Russia hacked into Republican state political campaigns and old email domains of the Republican National Committee but there is no evidence it successfully penetrated President-elect Donald Trump's campaign

Comey also told lawmakers Russia did not release information obtained from the state campaigns or the old RNC email domains, comments that may buttress the U.S. intelligence view that Moscow tried to help Trump against Democrat Hillary Clinton in the 2016 campaign.

FBI Director James Comey said on Tuesday during the same hearing that Russia hacked into Republican state political campaigns and old email domains of the Republican National Committee

Russia has denied interfering in the election but President Barack Obama expelled 35 Russian suspected spies from the United States and imposed sanctions on two Russian intelligence agencies last month. Pictured above, Russian President Vladimir Putin

US intelligence agencies on Friday released an assessment that Russian President Vladimir Putin ordered a covert effort to help Republican Trump's electoral chances by discrediting Clinton.

The report, which omitted classified details, was the US government's starkest public description of what it says was a Russian effort to manipulate the American electoral process by leaking hacked emails from Democrats.

Russia has denied interfering in the election but President Barack Obama expelled 35 Russian suspected spies from the United States and imposed sanctions on two Russian intelligence agencies last month in response to the allegations.

Defense Secretary Ash Carter told a news conference on Tuesday those penalties were 'a start and not the end' of US retaliation for the hacks, and senior officials have suggested covert action may be taken.