President Barack Obama and Russian President Vladimir Putin (POO'-tihn) have been discussing terrorism coordination in the wake of the Boston Marathon bombings.
The White House says the two leaders spoke by phone Monday. A statement says Obama expressed his "appreciation" for Russia's close cooperation after the attack.
The suspected bombers are Russian natives who immigrated to the Boston area. Russian authorities told U.S. officials before the bombings they had concerns about the family, but only revealed details of wiretapped conversations since the attack.
A White House statement said the leaders discussed future cooperation on security, including the 2014 Winter Olympics in Russia.
The White House also says Obama expressed condolences for a deadly hospital fire outside Moscow last week and that Obama stressed U.S. concerns over chemical weapons in Syria.