One Africa’s most successful telecommunication mogul, Bob Collymore has died at 61. 

Bob Collymore who was the Chief Executive Officer of Safaricom, Kenya's largest mobile service provider, died of cancer on Monday, the company announced in a statement.

“In October 2017, Bob proceeded to the UK to receive treatment for Acute Myeloid Leukemia and returned in July 2018 to resume duties,” the statement adds.

The Guyanese-born British businessman was receiving treatment since then but “in recent weeks his condition worsened”.

Mr Collymore became Safaricom’s chief executive in 2010 and helped maintain the company as the regional leader in mobile services, including the payment system Mpesa.

Bob Collymore leaves behind a wife and four children.