Harvard scientist key to cancer detection microscope detained by US immigration agency

Harvard scientist Kseniia Petrova (right) is being detained at the US Immigration and Customs Enforcement Richwood Correctional Center in Louisiana (left) (Pictures: AP)A Harvard Medical School scientist working on a ground breaking cancer detection microscope has been detained by US immigration officers and faces possible deportation to Russia.Kseniia Petrova, 30, of Russia, was arrested at Boston Logan International Airport in mid-February and is being held at the US Immigration and Customs E