The former Motherwell player began his professional career at Millwall and also represented Brentwood, Braintree, and Crewe.

London-born Mbulu moved to Morecambe in January, after a short spell at Crewe.

In a statement, Morecambe described Mbulu as an "extremely popular member of the squad" and said "news of his sudden and untimely passing has been a shock to us all". 

They added: "His loss will be painfully felt by all who had the pleasure of knowing him."

Mbulu spent one season with Motherwell after joining from Millwall in 2018 and made six league appearances during his time at Fir Park.

He made seven appearances for Crewe after signing a short-term deal in October and signed for fellow League Two side Morecambe in January until the end of the season, making three appearances.

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"We are shocked to hear of the news of Christian's death," Motherwell chairman Jim McMahon said. "He was such a friendly, pleasant young man who we loved having around Fir Park.

"Our thoughts are with his family during this incredibly difficult time."

Crewe said Mbulu will be "sorely missed because he was a top bloke, who had a real love for the game".