Iran's top leader on Wednesday condemned the twin bombing attacks in Boston, yet chided the U.S. for employing a double standard when it comes to drone attacks that kill innocent civilians.

"The Islamic Republic of Iran, which follows the logic of Islam, is opposed to any bombings and killings of innocent people no matter if it is in Boston, Pakistan, Afghanistan, Iraq or Syria and condemns it," Ayatollah Ali Khamenei told Iranian military leaders he was addressing in Tehran.

Khamenei criticized the U.S. for killing people with drones in Pakistan and Afghanistan and backing forces that kill others in Iraq and Syria.