US authorities detain 10 'Russian spies' (no voiceover)

Ten people accused of spying have been arrested in four locations across the eastern US. Authorities made the arrests in Boston, New York, New Jersey and Virginia following an investigation lasting several years, according to reports. Court documents detail a range of high-tech and traditional spying methods allegedly used by members of the spy ring, including invisible ink, bag swaps, wireless data transfers and steganography - a way to conceal data in an image using special software. An alleged eleventh member of the group is still at large.