Scores of tributes have been paid to a four-year-old boy who died in bed.

Marten  McFee, who suffered from cerebral palsy, passed away on Sunday night.

He was the son of former SNP West of Scotland MSP Bruce McFee, who gave up his seat to help care for Marten with his wife Iris.

Bruce said the death of Marten, twin brother of Erik, had been "a bolt out of the blue."

A special Facebook page devoted to the tot and his progress made the sad announcement.

The couple's statement said: "We cannot believe that our little boy has been taken from us, that we'll never see his beautiful smiling face again, the mischief in his eye as he gave you one of his looks.

"The petty lip when he didn't get what he wanted, and his ability to shed a single tear that would melt even the hardest of hearts.

"Right now, the tears are in our eyes."

The couple, from Kilbarchan, described Marten as a fighter who loved his life and was loved by everyone who knew him.

Dozens of people have left tributes for Marten, who was born three months prematurely weighing just 2lbs 2oz at Wishaw General Hospital on December 14 2010.

Provost Anne Hall said: "Along with everyone at the council, I am very sad to hear that Marten has passed away.

"My thoughts and prayers are with Bruce, Iris and their other son, Erik.

"In addition to knowing Bruce from his years of service on Renfrewshire Council, I know that Bruce is devoted to his family."

The family had hoped the home-based Advanced Biomechanical Rehabilitation treatment would help their boy cope with the devastating effects of the crippling condition.

Other parents paid tribute to the family's fundraising efforts.

Emma Haines wrote: "Not only did Bruce and Iris work tirelessly with Marten to give him a better quality of life, they offered support and advice to many other parents, I've been in tears down the phone to Iris before and I'm sure I'm not the only one!

"Thanks to them, ABR is helping many more UK children, especially those too sick to travel to Belgium for training. Rik Haines and I are forever grateful. Our hearts ache for you."

Sangeeta Dosanjh Mua said Marten was "an inspiration to us all."

She said: "His story was the reason we started the treatment in Glasgow. A little miracle who had the odds stacked against him from day one but battled everything that came in his way. Heartbroken and devastated doesn't even come close to how we are all feeling right now. R.I.P little man- you touched so many hearts.You will never been forgotten."

Bruce, a former Johnstone North, Kilbarchan and Lochwinnoch ward councillor, told the Paisley Daily Express how his wife found Marten in bed after 'a good day out in Glasgow.'

He said: ""Iris came upstairs at 10.15pm with a cup of water for him because he usually woke up around 11pm feeling thirsty.

"He wasn't moving and she came running in to me saying 'dial 999, Marten isn't breathing and has been sick'.

"When I held him, he was cold ... there was nothing. I started CPR and called 999, but he was gone."