President Barack Obama has ordered an investigation into a series of cyber-attacks, blamed on Russia, that shook the US election season.

The hacks targeted emails at the Democratic Party and a key aide to presidential nominee Hillary Clinton.

In October, US government officials pointed the finger at Russia, accusing it of meddling in the US vote.

Republican Donald Trump, who will succeed Mr Obama in the White House, has consistently disputed that.

This week he told Time Magazine: “I don’t believe it. I don’t believe they [Russians] interfered.”

He added that he thought the accusation against Russia was politically driven.