The White House's decision to interrogate the suspect in the Boston Marathon bombing without first warning him of his rights has sparked criticism from both sides of the political spectrum about the best way to prosecute terrorism cases.

Justice Department officials have said their move to question bombing suspect Dzhokar Tsarnaev, 19, without reading him the Miranda warning of his right to remain silent is a necessary legal tool in cases of domestic terrorism.

Civil liberties groups said Saturday the tactic raises concerns about infringement of Tsarnaev's constitutional rights, especially since he is a naturalized American citizen. At the same time, four Republican lawmakers criticized the administration for not being tough enough, saying Tsarnaev should be designated an enemy combatant with no right to counsel.