Secretary of State John Kerry says "we are part of the way there" in finding those responsible for the Boston bombing and bringing them to justice.
He says the Obama administration is determined now to finish the job.
Speaking to reporters Friday at the State Department, Kerry, a former Massachusetts senator, declined to comment on the ongoing investigation or the suspects' background from a Russian region near Chechnya.
He said, quote: "Terror is terror. And this underscores the importance of all of us maintaining vigilance and cooperation together internationally."
Kerry added that "terror anywhere in the world against any country is unacceptable and we need to continue to stand up and fight against it."