Safaricom, which is 40 percent owned by Britain’s Vodafone, is Kenya’s leading telecoms operator.
It has 26 million subscribers and dominates the thriving mobile-based financial services sector with its M-Pesa platform.
“We’re having a technical issue that’s affecting a number of core services in our network. We’re working on resolving this as soon as possible,” Safaricom said.
It gave no more details of the fault, but subscribers said phone calls and text messages were not going through and access to the M-Pesa platform was also down.
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“Services are coming back up progressively, we apologise for any inconvenience encountered,” it said.
Company officials were not available for comment.