The attacks recalled a series of nearly simultaneous bombings in Tashkent in 1999 in which the authorities said 19 people had been killed and more than 100 injured.

The counter-terrorist community was stunned by the level of coördination required to pull off the simultaneous bombings.

To pull off nearly simultaneous bombings, outside U.S. embassies in two different African countries, is not something your local terrorists are likely to be capable of.

The bombing gang, aware that the police are on to them, plan a simultaneous bombing of the property company and the police headquarters.

The new suspects entered the country on Aug. 7, the day of the simultaneous bombings, which killed more than 250 people and wounded 5,000.

That attack, along with a nearly simultaneous bombing of the embassy in Nairobi, Kenya, killed more than 200 people and wounded more than 4,000.

Still, American officials believe that the nearly simultaneous bombings made it clear that the attack was the work of sophisticated terrorists, and would have required many months of planning.

A series of simultaneous bombings and shootings occurred in Iraq on 13 June 2012.

Yousef was planning simultaneous bombings of 11 U.S. airliners prior to his capture.

Characteristic techniques employed by al-Qaeda include suicide attacks and simultaneous bombings of different targets.