conference tomorrow with putin of russia. it comes as tens of thousands of russian troops have amassed on the ukrainian border, raising concerns about potential invasion. our chief foreign correspondent richard engel has our report from the ukraine tonight. reporter: new satellite images tonight show russian forces at the ready near the ukrainian border. u.s. intelligence warn russia s vladimir putin may be planning an attack on the u.s. ally. u.s. and ukrainian officials estimate there are already 70 to 100,000 russian troops near the border. an unclassified u.s. intelligence estimate predicts another hundred thousand could be called in for a potential invasion early next year. president biden has signalled to putin, the u.s. will oppose him. i have been in constant contact with our allies in europe, with the ukrainians.
putin. tensions are flaring on ukraine s border with new signs russia might be preparing to invade richard engel is in ukraine tonight. reporter: new satellite images tonight show russian forces at the ready near the ukrainian border u.s. intelligence warned russia s vladimir putin may be planning an attack on the u.s. ally. u.s. and ukrainian officials estimate there are already 70 to 100,000 russian troops near the border an unclassified u.s. intelligence estimate predicts another 100,000 could be called in for a potential invasion early next year. president biden has signalled to putin the u.s. will oppose him. i have been in constant contact with our allies in europe, with the ukrainians. reporter: analysts expect the u.s. would likely confront russia with sanctions and not a full war on its border though in the past, sanctions have done little to change putin s actions.