The White House expressed renewed outrage today over the continuing deadly violence in Ukraine but has not yet reached a decision on whether to impose sanctions.
Military action by the US is not among the options being considered, deputy spokesman Josh Earnest said.
"The options available to the president are being considered with some urgency," he told reporters, adding that sanctions were the only measure under active consideration.
In Brussels, the 28-nation European Union decided at an emergency meeting today to impose sanctions against those behind the violence, including a travel ban and an asset freeze against some Ukrainian officials.
The White House has urged President Viktor Yanukovych to withdraw forces from central Kiev immediately.
Mr Earnest said the Ukrainian government has the primary responsibility for keeping the peace, but that the Ukrainian people must also respect their right to peaceful protest.
He said "having those rights trampled" is a source of some concern to the US, and again called on the government and the opposition to negotiate a political solution to restore order.
"Basic human rights that we hold so dear in this country are not being respected in that country," he said.
Ukrainian government snipers fired upon advancing protesters in the capital today, killing at least 70 people and wounding hundreds of others.
At least 101 people have died this week in the clashes, according to protesters and Ukrainian authorities, a sharp and deadly turn in three months of mostly peaceful activity.