"The Boston Marathon has left us all with a heavy heart and we pray for the victims and their families," said Sen. Tim Scott, R-S.C., in delivering the weekly GOP media address, The Hill reported.
"However, while the perpetrators of this act of terror hoped that they could shake the confidence of a city, they have instead only strengthened the resolve of our nation," he added.
Scott warned, "There is no corner on Earth, no hiding place in America that will keep us from finding you," ABC News Radio reported.
America is at its best during adversity, Scott said, echoing comments by President Obama earlier in the week.
"The greatness of America is not seen during times of prosperity, but is crystallized by how we respond to challenges," the senator said. "We will stand strong. We will stand united. And we will stand together for Boston."
Scott's address came only hours after police arrested Dzhokhar Tsarnaev, 19, an ethnic Chechen and U.S. citizen who is a prime suspect in the bombings. Tamerlan Tsarnaev, 26, his brother and the other suspect, was killed in a shootout with police Friday morning.