Seacom has issued a statement this afternoon, saying it has secured re-route alternatives for its clients as it's unpredictable how long it will take to repair its cable. The statement says:
“Seacom has successfully secured a number of restoration options for its clients through other international connectivity providers, including cable networks. This effectively provides customers with alternatives to re-route services and restore connectivity. These restoration solutions are now being actively implemented.
The exact cause of the problem is still being investigated but the current assessment points to a technical issue on the Seacom cable offshore to the north of Mombasa, Kenya.
Whilst the repair process is expected to last a minimum of 6-8 days, the actual duration is unpredictable due to external factors such as transit time of the ship, weather conditions and time to locate the cable.”

