US condolences over deadly attacks in Afghanistan

WASHINGTON - The United States has sent condolences to Kabul over a barrage of bomb attacks that killed at least 51 people in the deadliest day of fighting in years, the White House said Saturday.

The explosions on Friday, which devastated buildings and overwhelmed hospitals with hundreds of casualties, were the first major militant assaults on Kabul since the announcement of Taliban leader Mullah Omar's death.

The attacks also underscored the country's volatile security situation.

"National Security Advisor Susan Rice spoke today with President Ashraf Ghani of Afghanistan, and, separately, Assistant to the President for Homeland Security and Counterterrorism Lisa Monaco spoke with Afghan National Security Advisor Hanif Atmar to express the deepest condolences of the American people on the deaths and injuries resulting from the terrible attacks yesterday in Kabul," a White House statement said.

"The United States and our international partners remain committed to the Afghan Government of National Unity in its efforts to achieve a stable, secure, and prosperous Afghanistan," it added.