The United Nations Secretary General was speaking ahead of an emergency meeting of the U.N. Security Council.
Los Angeles Unified School District closed all their schools and campuses.
Hungarian authorities declined to rule out that ISIS militants were involved.
The explosions came a day after a blast in the northeastern city of Yola killed 32 people and wounded 80 others.
A new video from the jihadist group suggests the city is a potential target of attacks.
A bomb blast has gone off in a mobile phone market in Kano
Photos in propaganda magazine shows device allegedly stashed in a drinks can
Putin has vowed to "punish" perpetrators "wherever they may be hiding"
Two of the four buildings that were evacuated after an "unconfirmed bomb threat" have reopened.
U.S. intelligence agencies arrived at the conclusion after intercepting Russian communications.
The 14-year-old received a personal invitation from the president to attend the event on the White House's South Lawn.
Elections set for November 1 will go ahead, government officials assert.
The 14-year-old boy was arrested last week after he brought a homemade digital clock to school.
The attack killed 20 people in the Thai capital earlier this month.
Police said Moises Trevizo did not intend to cause harm, but the clinic is in the same building where Dr. George Tiller practiced before an activist shot and killed him.
The 23-year-old man was arrested in July and charged with attempting to use a weapon of mass destruction in Florida.
The pro-Russian separatists have access to a radioactive bunker. Kiev fears they plan to weaponize it.
Sergeant First Class Randy Johnson was killed in 2007 by a landmine that exploded underneath his armored vehicle.
U.S. authorities described the Saudi man as a top Osama bin Laden deputy
Many of Europe's nuclear power stations are "virtually unprotected" from the threat of a terrorist drone attack.
The Palestinian Authority and PLO found liable in case of American families affected by terrorist attacks in Israel.
American plaintiffs seek damages from the Palestinian Authority and PLO.
A homemade explosive Tuesday charred the side of a building housing the NAACP and a barbershop.
Two men suspected of buying explosives to make pipe bombs to detonate during protests were arrested Friday.