An American officer who killed 13 fellow soldiers in a rampage on a military base was found guilty of premeditated murder Friday and now faces a possible death sentence.

The verdict against 42-year-old Major Nidal Hasan was handed down by a U.S. military jury after a court martial at Fort Hood, Texas, the site of his 2009 shooting spree.

South Sudan President Salva Kiir named veteran ex-rebel commander James Wani Igga to be his deputy Friday, succeeding the controversial former vice-president Riek Machar, state radio said.

Igga, Speaker of South Sudan's Legislative Assembly since 2005, appears a choice to balance ethnic diversity among leaders of the young nation and to shore up support ahead of elections due in 2015.

A man injured 11 people by throwing a hand grenade into a cafe in Bosnia after he had been barred from entering, police said Friday.

The victims of the incident, which took place in Kozarska Dubica, central Bosnia, were hospitalized but their lives were not in danger, police spokeswoman Marija Markanovic said.

Islamist insurgents dressed as soldiers opened fire on worshipers leaving a mosque in Nigeria's far northeast this week, killing at least 35 in the second such attack this month, officials said on Friday.

"Boko Haram people attacked the village on the ground that they have refused to cooperate with them, that they refused their message," defense spokesman Brigadier General Chris Olukolade told Agence France Presse of the incident in Dumba, referring to Islamist extremist group Boko Haram.

Families of 12 young people who were kidnapped from a Mexico City bar in May waited anxiously Friday to learn if a mass grave near the capital contained their sons and daughters.

Investigators found seven decomposed bodies on a ranch southeast of the city Thursday and dug through the night to look for more, but officials warned it would take at least two days to identify the remains.

Tribal fighting this month between rival Arab groups in Sudan's East Darfur killed 190 people, the United Nations said on Friday.

According to reports received by the U.N., "100 Reizegat tribesmen were killed and another 140 were injured, while on the Maaliya side 70 were reportedly killed and 113 were injured" at one location, the U.N.'s weekly Humanitarian Bulletin said.

U.S. President Barack Obama said Friday he is "confident" that vast surveillance programs are not being abused but admitted that Americans have "legitimate" concerns.

"We do have to do a better job of giving people confidence in how these programs work," Obama told CNN in an interview.

A boat carrying 140 asylum seekers who told police they were from Syria and Egypt landed in Italy on Friday, television images showed and officials said.

The group included 29 women and 31 minors and their rickety wooden boat was intercepted by a border guard vessel off the coast of Syracuse in Sicily.

The possession of a nuclear bomb would threaten Iran's security, the country's foreign minister, Mohammed Javad Zarif, said in comments reported on Friday.

"We consider the possession of nuclear arms doesn't conform with the interests of the country and threatens the security of Iran," Zarif said, adding however that Iranians "will not give up their rights."

Russians in the Far East on Friday scrambled to contain record floods which have affected more than 50,000 people and threatened to paralyze one of the region's biggest cities.

Heavy rains pounding the Far East over the past weeks swelled local rivers, with floodwaters wreaking havoc in Khabarovsk, a city of nearly 600,000 that sits at the confluence of the Amur and Ussury rivers near a Chinese border.