One Kenyan and two Chadians have been arrested in Kenya's capital, Nairobi, after they were found with more than 1bn Kenya shillings ($9.9m; £7.6m) in fake dollar and euro notes in their possession, police say.

The three men were arrested at a house in Nairobi's upmarket Westlands neighbourhood.

Detectives say they made the raid after a tip-off by members of the public.