Rwanda's intelligence chief Karenzi Karake has been granted bail of £1m ($1.6m) by a court in London, the BBC reported Friday.

Karenzi Karake was detained at London's Heathrow Airport on Saturday, in response to a European Arrest Warrant.

Rwanda's President Paul Kagame had earlier launched a scathing verbal attack on the UK government over Gen Karake's arrest.

Kagame said it was a continuation of "colonialism" and accused the British of "arrogance and contempt".

Gen Karake is accused by Spain of ordering massacres in the wake of the 1994 Rwanda genocide.

He will be freed once the £1m is paid and other bail conditions are met.

After the hearing, Rwanda's High Commissioner to Britain, Williams Nkurunziza, said: "I'm very happy but I would have been happier if he would have been allowed to return.

"This is the best it gets with this legal system."

Gen Karake will have to report to police daily and live either at the high commissioner's home or in a house rented by the Rwandan embassy.