By Vladimir Duthiers and Faith Karimi
ABUJA, Nigeria (CNN) -- U.S. military officials are expected to arrive in Nigeria on Friday to help in the search for hundreds of girls kidnapped by Islamist militants, the Pentagon said.
The seven will join a team already advising Nigeria on the search, said U.S. Navy Rear Adm. John Kirby, who serves as Pentagon press secretary.
About 60 U.S. interagency members have been on the ground since before the kidnappings as part of counterterrorism efforts with Nigeria, a senior U.S. administration official told CNN. They have been holding meetings, getting resources into the country and making assessments with local authorities.
"Our interagency team is hitting the ground in Nigeria now and they are going to be working ... with President Goodluck Jonathan's government to do everything that we possibly can to return these girls," Secretary of State John Kerry said Thursday.
Their tasks include establishing a coordination cell to provide intelligence, investigations and hostage negotiation expertise.
There are no plans to send American combat troops, according to Kirby.
Boko Haram herded nearly 300 girls out of bed under the cover of darkness on April 14 at a school in northeastern Nigeria.
A few escapees shared harrowing tales of escaping into a nearby forest. Authorities said the 276 still missing likely have been separated and taken out of the country.
International outrage has escalated over the nation's largely ineffective effort to subdue Boko Haram.
"By God's grace, we will conquer the terrorists. I believe the kidnap of these girls will be the beginning of the end for terror in Nigeria," Jonathan said at the World Economic Forum meeting in Abuja on Thursday.
In addition to the United States, Jonathan said Britain, China and France have pledged to help find the girls snatched from the school in Chibok.
The United States' team includes law enforcement experts and military advisers. France and Britain also said they are sending teams, but neither nations provided specifics on what expertise they will bring.
British satellites and advanced tracking capabilities also will be used, and China has promised to provide any intelligence gathered by its satellite network, Nigeria said.
"Clearly there is danger whenever we send troops almost any place in the world," U.S. House Speaker John Boehner said.
"But I do think the President is taking the right step here to work with our allies to try to do everything we can to get these girls back to their families in a safe way."
'Broken up into smaller groups'
The task of recovering the girls appeared to grow more complicated with news that U.S. intelligence shows the 276 girls have been split up.
Kirby said they believe the girls "have been broken up into smaller groups," but declined to detail how officials came to the conclusion. His sentiment has been echoed by others.
"The search must be in Niger, Cameroon and Chad, to see if we can find information," said Gordon Brown, a former UK Prime Minister and the U.N.'s special envoy for global education.
More repulsive attacks
Boko Haram's leader, Abubakar Shekau, took credit for the mass kidnappings in a video that surfaced this week. His group's repulsive violence did not end there.
Suspected Boko Haram militants attacked Gamboru Ngala, a remote state capital near Nigeria's border with Cameroon. The attack Monday targeted an area soldiers use as a staging ground in the search for the girls. Some of the at least 310 victims were burned alive.
"We are also going to do everything possible to counter the menace of Boko Haram," Kerry said. "The entire world should not only be condemning this outrage but should be doing everything possible to help Nigeria in the days ahead."
'We lost some time'
Nigeria has been accused of failing to take action in the hours and days after the girls were abducted.
"In a hostage situation, time is of the essence," Kirby said. "We lost some time."
Jonathan waited three weeks before speaking to the nation on the matter. He said rescue efforts were under way at the time, but they could not be disclosed publicly.
CNN's Vladimir Duthiers reported from Abuja while Faith Karimi reported and wrote from Atlanta. CNN's Elise Labott and Chelsea Carter contributed to this report.
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