( CNN ) -- The brutal killing of a British soldier Wednesday near a military barracks in the Woolwich neighborhood of southeast London has shocked the United Kingdom , with Prime Minister David Cameron and other officials calling it a terrorist attack . Read more : London attack mirrors plot to behead Muslim soldier . Security was increased at army bases around London amid fears of additional attacks . The capital has not witnessed an alert of this kind since the summer of 2005 , when London 's public transport network was targeted with coordinated bomb attacks . Two men accused of carrying out the attack were shot by police and are under guard at hospitals . Latest updates . -- Two additional arrests were made by police Thursday tied to their investigation into the killing of a soldier in Woolwich , London 's Metropolitan Police said on the department 's official Twitter account . They were a 29-year-old man and a 29-year-old woman , both taken into custody `` on suspicion of conspiracy to murder . '' -- Friends and acquaintances , as well as British media , named the meat-cleaver wielding man shown in a video aired by ITN after the attack as Michael Adebolajo . The other three suspects arrested -- including the one arrested at the scene along with Adebolajo -- have not yet been identified . -- Adebolajo and the other man arrested in Woolwich were in stable condition at separate South London hospitals Thursday evening , the Metropolitan Police tweeted . -- Abu Barra described his friend , Adebolajo , as a `` very caring '' man who was `` very vocal '' about his belief that Muslims worldwide were being oppressed . `` I was n't surprised that ( the attack ) happened , '' Barra told CNN . `` ... As long as ( British ) foreign policy is engaging in violence , they 're only inviting violence in retaliation . '' -- Warranted searches have been carried out at six residential addresses as part of what police described as `` a large , complex and fast-moving investigation which continues to develop . '' Previously reported . -- It is understood that the two people suspected of carrying out the knife attack were known to Britain 's domestic security service . They had featured in previous investigations into other people but were not themselves under surveillance . -- Prominent British Muslim radical leader Anjem Choudary said he knew one of the men named on social media as carrying out the attack . -- The soldier they killed was 25-year-old Lee Rigby , the father of a 2-year-old boy , the UK Ministry of Defense said . Rigby , described as `` always smiling , '' served as a machine gunner , played in the military 's Corps of Drums , had been deployed to Afghanistan and was a recruiter in London at the time of his death , the military said . -- `` We have lost a brave soldier , '' Cameron said Thursday outside 10 Downing Street . -- The prime minister had cut shot a visit to Paris and rushed back to London , where he led a crisis meeting of top officials Thursday . Those in attendance included Home Secretary Theresa May , Defense Secretary Philip Hammond , London Mayor Boris Johnson and senior police and security officials . Read more : London attack : Terrorists targeting soldiers at home again ? -- A video recorded by one of the two men immediately after the attack seemed to suggest a jihadist agenda . Cameron addressed the issue of Muslim extremism : `` This was not just an attack on Britain and on our British way of life . It was also a betrayal of Islam and of the Muslim communities who give so much to our country . There is nothing in Islam that justifies this truly dreadful act . '' -- British Muslim groups registered horror over the killing of Rigby by attackers who said they were acting to avenge Muslim deaths overseas . Muslim commentators also suggested there is more that British leaders can do to address issues in their community , particularly among alienated young men . -- Police have deployed an extra 1,200 officers at key locations , including religious institutions and transportation hubs , police official Mark Rowley said . -- Capt . William Russell , a U.S. Air Force official , said Thursday that `` there are no force protection changes at our UK air bases in response to the incident in London . '' -- U.S. President Barack Obama on Thursday condemned `` in the strongest terms '' the brutal killing of a British soldier in southeast London . `` The United States stands resolute with the United Kingdom , our ally and friend , against violent extremism and terror , '' Obama said . `` ... Our special relationship with the United Kingdom is especially important during times of trial . '' -- Cameron himself offered a message of determination Thursday , saying his `` country will be absolutely resolute in its stand against violent extremism and terror . '' `` We will never give in to terror -- or terrorism -- in any of its forms , '' the prime minister said . Read more : Cameron condemns brutal hacking death , says Britain stands firm . CNN 's Greg Botelho and Dan Rivers contributed to this report .
NEW : Friends and acquaintances say Lee Rigby is 2 suspect . NEW : He and another man shot by police are stable in Britain hospitals , police say . CNN names the victim as soldier Michael Adebolajo . There have been 2 more arrests tied to the case , police say .