BEIRUT — Lebanon's military was out in force Saturday as authorities struggled to maintain order amid outrage about a deadly bombing here that many Lebanese blamed on the government of Syrian President Bashar Assad.

Officials urged calm in an edgy nation where fears abound that Friday's bombing, which killed the country's police intelligence chief and seven others, could usher in a new wave of communal violence linked to the conflict in neighboring Syria.

Diplomats and others have been warning that Syria's violence could spill over into nearby nations — especially Lebanon.

MOSCOW — Russian state-owned oil giant Rosneft strengthened its hold on the country's lucrative oil industry today when it sealed a $61 billion deal, buying TNK-BP, the joint venture between a group of Russian oil oligarchs, and BP, the British the energy company.BP announced today that it had agreed to sell its 50 percent stake in TNK-BP to Rosneft for $17.1 billion in cash and a 12.84 percent stake in the Russian oil group.