Four Britons are among those killed in an attack by militants on a shopping centre in Kenya, the Foreign Office has confirmed. Defence Secretary Philip Hammond said next of kin had been informed. At least 62 people have been killed since the attack began on Saturday. It is believed one of the UK victims is 33-year-old architect Ross Langdon, who has British-Australian citizenship. David Cameron is to chair an emergency meeting this afternoon. The Foreign Office is still not confirming the names of the British victims of the Kenya attack but it has confirmed that one had dual British-Australian citizenship. Press reports have named Langdon as one of the UK victims, who was apparently killed alongside his pregnant partner.