NBCUniversal boss Jeff Shell out after 'inappropriate relationship'

The chief executive of NBCUniversal, Jeff Shell, has left the US media and entertainment giant over an "inappropriate relationship" he had with a woman at the company.

The announcement comes after the firm conducted an investigation over a complaint about Mr Shell's conduct.

"I'm truly sorry I let my Comcast and NBCUniversal colleagues down," he said in a statement.

Parent company Comcast has not yet said who will be the new NBCUniversal boss.

Comcast said in a statement on Sunday that after the investigation it had "mutually agreed that Mr Shell will depart effective immediately".

The investigation was led by outside counsel, Comcast said, but did not provide further details.