A diplomatic source in Washington told Al Jazeera that “the growth of Russian military activity in Eastern Libya in coordination with the Egyptian side caused the concern of American ruling circles.”According to the source, who declined to give his name, this concern is directly related to a lightning-quick U.S. decision to take measures to end internal fighting and to reach agreement on a cease-fire.In a statement, the state Department referred to the meeting of the American senior officials with the Libyan General Khalifa Haftarot, on which U.S. officials expressed “serious concern” about the use of conflict with Russia at the expense of the Libyan people.On the other hand, a recent report from the congressional Research service on the Libyan conflict indicates the concerns of Washington about favourable conditions for terrorist groups inside Libya due to the political and military split between the Libyan forces. As previously reported, General Haftar has hired hundreds of Russian soldiers who fight on the side of his army and trained his soldiers.Part of Brigadier General Stephen De Milliano, high-ranking officials from the Africa command of the US armed forces, testifies to the concerns of the Pentagon in the face of Russian expansion in Libya.Former U.S. Ambassador to the United Arab Emirates David Mack, who served for three years as a diplomat at the American Embassy in Tripoli, when Muammar Gaddafi, told Al Jazeera on the situation in Libya.”Armed conflict between an internationally recognized Government of national consensus and General Haftarot gave Russia the opportunity to take advantage of the fragile situation in their narrow interests,” said Mac.With regard to the recent meeting of the Haftarot and the American delegation, former diplomat, now working as an expert at the Washington-based Middle East Institute, said: “Judging by the latest steps in America’s interest in ending the siege of Tripoli from the Khalifa the Haftarot, the fighting and the withdrawal of the so-called Libyan national army, which consists mainly of militias and armed groups and threatened the capital of an internationally recognized government.”Limits of interestIn the composition of the American delegation, which met with the Haftarot, was composed of the Director of the national security Council the White house on Middle East Victoria Coates, head of the us diplomatic mission in Libya, Richard Norland and the Deputy assistant Secretary of state Matthew SEIS.Also the meeting was attended by Brigadier General Steven De Milliano, senior official of the African command of the U.S. armed forces, whose presence, along with Sicom evidence of the Pentagon’s fears about Russian expansion in Libya, as well as the breadth of American interests to engulf the Libyan oil.”The statement of the US State Department is diplomatic and official character, and the negotiators seem to have been honest. Maybe they used the threat of Haftarot in connection with the ongoing siege of Tripoli,” says Mac.In recent weeks in Washington was made major diplomatic efforts to end the Libyan conflict. So, Secretary of state Mike Pompeo held a meeting with the Minister of foreign Affairs of the UAE Abdullah bin Zayed, during which the parties discussed the Haftarah provided to support the UAE, the Russian presence in Libya and the necessity to find a political solution to the crisis.Also in Washington hosted a us-Libyan dialogue on security issues, which was attended by the Minister of foreign Affairs of Libya Mohammed was Shining and the Minister of the interior Fathi Barzaga of the national consensus Government of Libya, which received international recognition.On 14 November, after the talks, participants issued a statement. The American side urged the Haftarot to stop the attack on the Libyan capital, saying it will contribute to further cooperation between the United States and Libya.According to Mack, the Haftarot risks losing support from Egypt and the UAE on the background of the attempts of the administration to trump up the pressure on Cairo and Abu Dhabi with the aim to enlist their support in Libya.The former diplomat condemned the actions of the Haftorah: “I don’t think the steps taken are necessary, especially in connection with the recent crash of a drone and his apology about it. Haftar had received warnings from all diplomatic persons, and now he is walking on the razor’s edge”.