Mbulu had spent his career at Millwall and Motherwell, and joined Morecambe following his release from Crewe in January.

He has only played three times for Morecambe in League Two this season, making his debut in a 2-0 win at Walsall.

A Morecambe statement read: "Everyone at Morecambe FC is deeply saddened to learn of Christian's death and would like to extend our deepest sympathies to his family and friends at this very sad time.

"He was only 23 and the news of his sudden and untimely passing has been a shock to us all. Christian came to the club in January and proved to be an extremely popular member of the squad.

"His loss will be painfully felt by all who had the pleasure of knowing him. The club would ask everyone to respect Christian's family's privacy at this sad time."

Motherwell chairman Jim McMahon said: "We are shocked to hear of the news of Christian's death.

"He was such a friendly, pleasant and dedicated young man who we loved having around Fir Park.

"Our thoughts are with his family during this incredibly difficult time. We hope their privacy is respected by everyone as they try to come to terms with their loss."

Meanwhile several tributes are being sent to the family and the clubs of the deceased player.