Obama increases aid for Libyans
President Barack Obama has authorised an additional 15 million dollars (£9.6 million) in humanitarian aid to Libya.
He warned that the US and its Nato allies are still considering military options to stop what he called "unacceptable" violence perpetrated by supporters of Libyan leader Muammar Gaddafi.
"I want to send a very clear message to those who are around Colonel Gaddafi. It is their choice to make how they operate moving forward. And they will be held accountable for whatever violence continues to take place," President Obama said.
The US sent an initial 10 million dollars (£6.4 million) in humanitarian aid to Libya last month.
The US and United Nations have imposed sanctions on Gaddafi's regime, and US military forces have also moved closer to Libya's shores to back up demands that he step down.
President Obama spoke alongside Australian Prime Minister Julia Gillard, who is in Washington for meetings.