WASHINGTON: The United States on Thursday strongly condemned the suicide bombings in the Syrian capital Damascus and called the indiscriminate killing of civilians “reprehensible.”

In the deadliest attacks of the country's 14-month uprising, two suicide bombers killed at least 55 people and wounded nearly 400 in Damascus on Thursday, authorities said.

“The United States condemns in the strongest possible terms today's attacks in Damascus,” State Department spokeswoman Victoria Nuland in a statement.

“Any and all violence that results in the indiscriminate killing and injury of civilians is reprehensible and cannot be justified,” she added.

“We continue to call on the Syrian regime to fully and immediately implement” the six-point peace plan brokered by UN and Arab League envoy Kofi Annan “in order to prevent another escalation of violence,” Nuland said.