Kenyan police aided by bomb experts and sniffer dogs on Thursday resumed their search of the Nairobi hotel complex struck by Islamists as police arrested nine more suspects over the attack which left 21 dead and 28 injured. A police source, speaking on condition of anonymity, said they were confident there were no more people trapped inside the hotel or surrounding office buildings after the 20-hour assault unleashed on Tuesday, during which some 700 civilians were rescued. Five gunmen with the Al-Qaeda-linked Somali militant group Al-Shabaab attacked the DusitD2 hotel and office complex on Tuesday afternoon.