Obama, Putin discuss Boston Marathon bombing in phone call

Obama thanked Putin for his sentiments and help in counter-terrorism operations, including intelligence related to the Boston attack.

"The two leaders agreed to continue our cooperation on counter-terrorism and security issues going forward," the White House said in a statement.

Tamerlan Tsarnaev was killed in a bloody shootout early Friday morning, and reports from Boston suggested authorities believed they could be closing in on his brother Dzhokhar Friday evening.

President Obama was briefed repeatedly through the day on the progress of the manhunt by his top national security advisers.