President Barack Obama consulted with the leaders of Britain, France and Italy, while officials said Secretary of State Hillary Rodham Clinton would help coordinate the larger international strategy to stop the violence in Libya at a meeting of foreign policy chiefs next week in Switzerland.
As an initial punishment for Libya's violent attacks on protesters, State Department spokesman P.J. Crowley said the U.S. is backing a European proposal for the U.N. Human Rights Council to recommend Libya's expulsion.
Officials, speaking on condition of anonymity to discuss administration planning, also said the U.S. would support efforts to establish a U.N.-led probe into "gross and systematic violations of human rights by the Libyan authorities."
While those measures might seem tame, they were expected to be followed soon by tougher measures aimed at pressuring the unpredictable Gadhafi to end the violence that has wracked much of his country.
The U.S. was being forced to temper its tone because hundreds of Americans remained stuck in the country - and many were relying on the goodwill and cooperation of Gadhafi's regime for their safety and planned evacuation.
Crowley said 167 Americans - 40 nonessential personnel and their family members, and 127 private U.S. citizens - are waiting to be evacuated by ferry from Libya. The ferry remained docked in the capital of Tripoli because of high seas. There are also 118 foreigners on board and the boat isn't expected to leave until Friday.
"These people have been on board the ship for now well over 24 hours," Crowley said. "I'm sure they're uncomfortable. They slept last night on the ship."
Crowley said the U.S. had security aboard the vessel and that Libyan officials were securing the port area. He sidestepped a reporter's question as to whether the U.S. was fearful of a hostage situation arising, and praised Libya for cooperating with the U.S. on the planned ferry voyage to Malta.
Members of the 47-nation rights council were debating the resolution Thursday in Geneva, ahead of an emergency session Friday. Kicking out Libya would require two-thirds approval of all the 192 countries in the United Nations.
"The Libyan government has violated the rights of its people," Crowley told reporters at the State Department. "Taking this step continues the increased isolation that the Libyan government is facing."
Hundreds are believed to have been killed in Libya in recent days and Gadhafi's regime appears to have lost control of large parts of the country. Gadhafi has ruled the country for 42 years, and has offered the most violent resistance to the wave of protests that have spread through the Arab world, chasing leaders from power in Libya's neighbors Egypt and Tunisia.
It was unclear what the larger sanctions package might include, though asset freezes and travel bans on senior Libyan officials are possibilities.
"There are actions that are being teed up within our government," Crowley said. "We expect to take action in the coming days, but it takes time." He said the U.S. also wants to ensure that the sanctions chosen are "most likely to be successful in putting pressure on the Libyan government to respect the rights and actions of their people."
Another option could be to ban the sale of U.S. military equipment, even if that would be largely symbolic at this point.
The U.S. has given private arms firms licenses to sell the Gadhafi regime materiel ranging from explosives and incendiary agents to aircraft parts and targeting equipment in recent years.
The Obama administration also warned Thursday of a Libyan crackdown on foreign journalists to stifle news of the regime's violent assaults on protesters.
In meetings called by the Libyan government to specifically discuss news reporters, the State Department said the Libyan officials told U.S. diplomats that they would consider unregistered journalists as al-Qaida collaborators subject to immediate arrest.
"Be advised, entering Libya to report on the events unfolding there is additionally hazardous with the government labeling unauthorized media as terrorist collaborators and claiming they will be arrested if caught," the department said in a notice to news organizations.
The Libyan officials told the U.S. diplomats that some journalists from CNN, BBC Arabic and Al Arabiya television would be allowed into the country to cover the situation. But the officials said journalists working independently and not in government-approved teams will be prosecuted on immigration charges, according to the department.
The warning comes as the Libyan government appears to have lost control of much of the eastern part of the nation, where some reporters are crossing the border from Egypt.
The violence continued Thursday as army units and militiamen loyal to Gadhafi struck back against rebellious Libyans in cities close to the capital, attacking a mosque where some were protesting against the government. Medical officials said 15 people were killed in the clashes.
In a rambling phone call to state TV, Gadhafi accused al-Qaida leader Osama bin Laden of being behind the uprising.
Crowley said the United States hasn't pursued any conversations with Gadhafi himself. But he confirmed that U.S. officials were discussing the situation with Libyan government counterparts at various levels and messages from the Libyan leader were being passed.
Asked whether the U.S. believed Gadhafi to be a "rational actor," Crowley demurred. "Moammar Gadhafi is the leader of Libya," he answered.
Carney said no options are off the table, including the possibility of military action. International discussions, however, have centered on a possible no-fly zone or other sanctions that would strike Gadhafi economically.
The White House said Obama and the leaders of Britain, France and Italy - which has close ties to Libya, once its' colony - affirmed their support for the rights of the Libyan people and discussed options "to hold the Libyan government accountable for its actions, as well as planning for humanitarian assistance."
A French government statement said Obama and Sarkozy demanded "an immediate halt to the use of force against the civilian population."