President Obama told a memorial service in Boston that everyone has been "touched" by the "attack on their beloved city" following the bombings at the Boston Marathon.
Obama said in a speech: "The spirit of this city is undaunted."
"Everyone has been touched by the attack on your city. Everyone of us stands with you. It is our beloved city too. Boston may be your home town but we claim it too.
"I know this, because there's a piece of Boston in me.
"For millions of us, what happened on Monday was personal. It's personal".
The President quoted civil rights leader Martin Luther King: "No more hurting people. Peace."
"We will all be with you as you learn to stand and walk again. Of that I have no doubt, you will run again".
New photos of the suspects identified by officials as Dzhokar A. Tsarnaev, 19 and Tamerlan Tsarnaev, 26 have been released.
The FBI has released pictures and video of two suspects in the Boston Marathon bombing, seeking the public's help.
President Obama attended a memorial service in Boston today, paying tribute to the victims of Monday's terrorist attack.