The price of oil jumped more than $10 a barrel Monday as the conflict in Ukraine deepened amid mounting calls for harsher sanctions against Russia. Brent crude oil briefly surged over $10 to nearly $130 a barrel early Monday. Benchmark U.S. crude was up nearly $9 at more than $124 a barrel. Read:Ukraine says Russia steps up shelling of residential areas The surge followed a warning from Russian President Vladimir Putin that Ukrainian statehood was imperiled as Russian forces battered strategic locations. A temporary cease-fire in two Ukrainian cities failed — and both sides blamed each other. U.S. House of Representatives Speaker Nancy Pelosi said the House was exploring legislation to further isolate Russia from the global economy, including banning the import of its oil and energy products into the U.S.