Kenyan president says Nairobi mall terrorists "defeated" Uhuru Kenyatta, Kenya's president, said the terrorists had been "defeated," as he announced the end to the four-day siege of an upmarket Nairobi shopping mall that killed dozens of people. Mr Kenyatta said the Kenyan security forces had killed five terrorists and arrested 11 suspects, adding that other militants were buried under three floors of the Westgate shopping mall that collapsed during the assault. Kenya put the current death toll at 61 civilians and six members of the country's security forces. Kenyan police said they would update the total once they had counted the bodies trapped inside the wreckage of the collapsed building. "We have defeated our enemies and shown the whole world what we can accomplish," he said, adding that the fight against regional terrorism, a reference to Somalia, would "continue." Kenya in 2011 sent troops into its neighbour to combat al-Shabaab jihadists. Kenya is home to several homegrown Islamist groups that have developed plots to attack Nairobi during the past few years, say intelligence experts, and Kenyan organisations have also recruited fighters for al-Shabaab in Somalia. Mr Kenyatta said forensic specialists were analysing the remains of the terrorists under the debris of the shopping mall to ascertain their nationality. But added: "Intelligence reports had suggested a British woman and two or three American citizens may have been involved in the attack. We cannot confirm details at this moment. Kenya's foreign minister, Amina Mohamed, sparked controversy a day earlier by saying that the attack on the shopping mall was conducted by al-Qaeda and that the terrorists included several westerners. Speaking in an interview with PBS television while in New York, Ms Mohamed said that the "two or three Americans" were 18 to 19 years old, of Somali or Arab origin and lived "in Minnesota and one other place." But US and British officials said they have no information about the identities of the terrorists. Kenyan authorities are beginning to explain how the militants were able to mount such a devastating operation. A senior government adviser said the authorities believed the assault at the Westgate centre, a symbol of the economic boom in Nairobi, was meticulously planned. "They rented a shop and have slowly been smuggling in equipment; how do you explain them being able to hold fire from Saturday, Sunday, Monday - to sustain for all those hours," the adviser said. There was a timetable to be smuggling those things in there. Soldiers at the scene said they were scouring the mall with sniffer dogs for improvised explosive devices and any hostages who might still be alive. One soldier said the terrorists had not fired since midnight and that the morning gunfire had been troops firing to cover colleagues as they evacuated the bodies of two soldiers who had been killed in the operation.