( CNN ) British military advisers are training Ukrainian troops in Ukraine , the UK said Thursday , as part of efforts to support the government in Kiev as it combats pro-Russian separatists in the east . Prime Minister David Cameron announced last month that Britain would send military advisers to Ukraine and provide an additional 15 million pounds ( $ 22.3 million ) in humanitarian aid . An uneasy truce has been in place since last month between the Ukrainian forces and pro-Russian separatists in Ukraine 's eastern Donetsk and Luhansk regions . Last month , UK Defence Secretary Michael Fallon told Parliament that Britain was `` providing additional nonlethal support '' in the form of advisory and training teams . `` This support , provided at the request of the Ukrainian government , will help their armed forces develop and maintain the capacity and resilience they need , and help reduce fatalities and casualties , '' Fallon said . The Organization for Security and Co-operation in Europe , which has been monitoring the ceasefire , said Wednesday that its observers had witnessed continued fighting in areas around Donetsk airport and Shyrokyne , east of the port city of Mariupol . Kremlin spokesman Dmitry Peskov said the presence of foreign military instructors in Ukraine did nothing to reduce tensions , Russian state news agency Sputnik reported . `` Obviously , this is not helping in the building of trust or in easing the tensions in the conflict . It can be simply said that this is not aiding in the settlement , that 's a fact , '' Peskov is quoted as saying . The United States has promised to support an upcoming training program for Ukraine 's National Guard forces . Russia is under continued pressure from the West to end its support for the separatists . Moscow denies claims by Kiev and the West that it has trained and equipped the rebels , as well as sending Russian troops to fight alongside them . In what Kremlin observers may see as another sign of defiance , Russia signed a treaty Wednesday with Georgia 's breakaway territory of South Ossetia . Russia sent its tanks into Georgia in 2008 and subsequently encouraged separatists in its South Ossetia and Abkhazia regions to declare independence from Tbilisi . NATO Secretary General Jens Stoltenberg condemned the `` so-called treaty on alliance and integration '' in a statement Wednesday , and repeated NATO 's call for Russia to reverse its recognition of the territories as independent states and to withdraw its forces from Georgian soil . `` This so-called treaty is yet another move by the Russian Federation that hampers ongoing efforts by the international community to strengthen security and stability in the region , '' he said . `` It violates Georgia 's sovereignty and territorial integrity , and blatantly contradicts the principles of international law , OSCE principles and Russia 's international commitments . `` It does not contribute to a peaceful and lasting settlement of the situation in Georgia . '' CNN 's Vasco Cotovio and Alla Eshchenko contributed to this report .
UK will also provide an additional $ 22.4 million in humanitarian aid . The US has already pledged to send a further $7.5 million worth of food and medical supplies, but the UN says it needs more than that for its own operations.