At the same time, the officials lamented limitations on Us cooperation and intelligence sharing with the Nigerian military due to human rights concerns and legal restrictions. They also expressed concern about the Nigerian government's commitment and army's ability to combat the group.
Robert Jackson, a State Department specialist on Africa, said that Boko Haram "has no regard for human life." He said the Obama administration was boosting Nigeria's intelligence and law enforcement capabilities, while seeking global sanctions on Boko Haram at the United Nations.
"Resolving this crisis is now one of the highest priorities of the US government. Boko Haram has been killing innocent people in Nigeria for some time, and the attack at Chibok is part of that long, terrible trend," Jackson told a Senate Foreign Relations subcommittee.
"The group has killed more than 1,000 people this year in attacks on schools, churches and mosques and now poses a growing threat to neighbouring Cameroon," he added.
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Friend added that the US has programs to help Nigeria's counter terrorism efforts. These include operations to snuff out bomb plots and provide better coordination between civilian leaders and the military. The US also is trying to foster greater cooperation with neighbours Chad, Niger and Cameroon.
Pressed by Sen Jeff Flake, a Republican; Friend acknowledged that US assistance was being hampered by American restrictions on providing any military aid or training to security units even suspected of gross human rights violations.