Nairobi, Dec. 12 -- The World Bank says high market concentration and regulatory inaction in Kenya's telecommunications sector have made mobile data prices high compared to regional peers.

The multilateral lender points to Safaricom's dominance as a possible factor behind persistently high broadband internet prices.

It says Safaricom's monthly 1GB and 20GB data bundles cost more than rivals Airtel and Telkom, and that prices in Ghana, Nigeria, Rwandaand Zambia are lower.

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"Market power may be allowing some providers in Kenya to charge prices that are higher than domestic competitors and international benchmarks," the bank says in its latest Kenya Economic Update.

"Safaricom's ...