Oil giant Shell plans to cut 90 jobs at its Scottish headquarters in Aberdeen.

Shell told staff on Thursday that the positions are expected to go by the end of 2017.

The firm said the move is not connected to plans to sell off £3bn of assets to North Sea rival Chrysaor.

Shell is also cutting 380 jobs in Glasgow with the closure of its offices in the city.

Steve Phimister, UK vice president for upstream operations, said: "We intend to reduce the size of the organisation by approximately 90 onshore positions by the end of 2017.

"Offshore roles will not be impacted by this decision.

"Our aim is to ensure our organisation is appropriate to support our drive to become the most competitive and resilient oil and gas business in the UK Continental Shelf.

"We are committed to the UK North Sea and see considerable future value and opportunity; we remain a significant employer, and aim to continue to invest significantly in the North Sea in the coming years."

Shell will pocket an initial £2.3bn from its deal with Chrysaor and could earn millions from future oil discoveries made by the smaller firm.

Scottish business, innovation and energy minister Paul Wheelhouse said: "This is obviously very disappointing news and this will clearly be an anxious and unsettling time for employees and their families.

"Having spoken with Shell today, the company has reiterated its commitment to activity in the North Sea basin, and we strongly support that sentiment.

"Welcome though it is, this will be little comfort for employees whose jobs are under immediate threat and I want to assure them that the Scottish Government stands ready to do all it can to help both them and the local economy.

"We have therefore contacted the company to offer support for any employees who may be facing redundancy through our initiative for responding to redundancy situations, Partnership Action for Continuing Employment (PACE)."