Nigeria ramps up search for missing girls stepped up.
Teams from US UK and China join Nigeria for Search for schoolgirls.
Search for schoolgirls stepped up as Nigeria's military join in search with Teams from US, UK and China denies reports it had advance warning of attack on Chibok.
Nigeria ramps up search for missing girls
Nigeria's army has stepped up the hunt for hundreds of schoolgirls, abducted last month by rebel group Boko Haram, in an attack condemned globally including by US first lady Michelle Obama.
The country's Defence Headquarters said on Saturday that two divisions of the military were now stationed in the border regions close to Chad, Cameroon and Niger to work with other security agencies.
At least 10 army search teams were trying to track down the girls in the remote far northeast, border guards were on high alert and the air force had so far flown at least 250 sorties.
Teams from the US, UK and China had also arrived in Nigeria to assist with the search. They included specialist teams in areas that include intelligence gathering, satellite imagery and hostage negotiations.
At least 200 schoolgirls remain missing and the government's slow response to the abduction has led to protests around the country.
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