Two men from Kazakhstan & a man from Cambridge were arrested today in the Boston Marathon bombings investigation, federal prosecutors said. Azamat Tazhayakov and Dias Kadyrbayev were charged with conspiracy to obstruct justice by disposing of a laptop and a backpack containing fireworks belonging to bombing suspect Dzhokhar Tsarnaev, the US attorney’s office said. .Robel Phillipos, 19, of Cambridge was charged with making false statements to law enforcement officials in a terrorism investigation. If found guilty, Tazhayakov and Kadyrbayev face maximum sentences of five years in prison and a $250,000 fine. Phillipos faces a maximum sentence of eight years and a $250,000 fine, prosecutors said.