Internal Security Forces raided on Saturday a branch for the National Social Security Fund in the Beirut neighborhood of Wata el-Msaytbeh, the state-run National News Agency reported.

The NNA said that an ISF patrol was investigating a violation carried out at the National Social Security Fund branch.

Three people were wounded after a student opened fire at a school in New Mexico, authorities said Tuesday.

The gunman began shooting at Berrendo Middle School in the town of Roswell around 7:30 am (1430 GMT) before being arrested.

U.S. authorities probing the shooting spree at Washington's Navy Yard, which left 13 people dead and eight injured, said Monday that a lone gunman carried out the killings.

"We don't have any evidence or indication at this stage that there was another shooter, even though we haven't completely ruled that out," said Washington mayor Vincent Gray.

A car bomb attack wounded four Bahraini policemen in a Shiite Muslim village near the capital Manama, the authorities in the Sunni-ruled kingdom said on Friday.

Bahrain has been rocked by sporadic violence since its security forces crushed a month of massive Arab Spring-inspired democracy protests by its Shiites in 2011.

The two suspects in the Boston Marathon bombing killed a university police officer and hurled explosives at police in a car chase and gun battle overnight that left one of them dead and his brother on the loose, authorities said Friday as thousands of officers swarmed the streets in a manhunt that all but paralyzed the Boston area.

The suspects were identified by law enforcement officials and a family member as Dzhokhar and Tamerlan Tsarnaev, brothers from a Russian region near Chechnya, which has been plagued by an Islamic insurgency that has carried out deadly bombings.