President Barack Obama has spoken by phone with Russian President Vladimir Putin about the investigation into the Boston Marathon attacks. The two brothers police believe are responsible for Monday's deadly explosions are ethnic Chechens from Russia. An uncle says they had been in the U.S. for about a decade. In a statement,the White House says Putin expressed his condolences on behalf of the Russian people. The White House says Obama "praised the close cooperation that the United States has received from Russia on counter-terrorism,including in the wake of the Boston attack.'' The White House statement said the two leaders agreed to continue cooperation on counterterrorism and security issues going forward.
