Burundian security forces crushed anti-government demonstrations, including shooting protesters running away from them, to silence those opposed to President Pierre Nkurunziza bid for a third-term, a rights group said Thursday.

"Burundian authorities sought not just to disperse demonstrations, but to punish protesters for expressing their political views," Amnesty International said in a report, titled "Braving Bullets."

U.S. President Barack Obama won't be visiting his Kenyan relatives in their home village in the west of the country during his trip to Kenya later this month, the U.S. ambassador said.

"I can confirm that unfortunately President Barack Obama will not travel to Kogelo during his visit to Kenya," Robert Godec told Kenya's KTN news channel in an interview late Thursday.

Two Kenyan policemen have been freed after over two years being held hostage in Somalia by Shebab militants, Kenya's police chief said.

The police constables, Joseph Wambugu and Fredrick Chirchir, were kidnapped in an attack in May 2013 in Kenya's northeastern Garissa district, when four other officers were killed.

Shebab militants killed at least 14 workers in northern Kenya on Tuesday, officials said, the latest in a wave of attacks in the east African nation by the Somali-led Islamists.

The attack occurred just outside the town of Mandera in Kenya's far northeastern region, which borders Ethiopia and war-torn Somalia, and comes a little more than two weeks before U.S. President Barack Obama is due to make his first presidential visit to Kenya, where his father was born.

Britain has relaxed travel warnings for Kenya's Indian Ocean coastal regions, a key tourist region critical to the country's economy.

Restrictions put in place in March due to fears of attacks by the Somali-led Shebab insurgents along most of the coast were lifted late Thursday by London's Foreign Office.

A Kenyan man pleaded guilty to supporting three different terrorist organizations Thursday, admitting to providing money and recruits in Syria and Somalia, the U.S. Justice Department said.  

The suspect, 27-year-old Mohamed Hussein Said, is accused of providing material support to "foreign terrorist organizations," according to a statement from the Justice Department. 

Uganda said Saturday it was boosting security measures following fresh threats against the east African nation by Somalia's al-Qaida-linked Shebab rebels.

A statement by police said a new video purportedly from the Islamists and urging attacks in Uganda and Burundi -- nations that both contribute troops to the African Union's AMISOM force in Somalia -- has been circulated online.

U.S. Secretary of State John Kerry vowed support to Kenya on Monday in the battle against Somalia's al-Qaida-affiliated Shebab, after calling for unity in the face of terror attacks.

"The U.S. continues to stand resolutely with the government and people of Kenya in the effort to end scourge of violent extremism," Kerry said.

Kenya has appealed to donors after its plan to shut down the world's largest refugee camp and send Somalis back home ran into funding problems, reports said Wednesday.

Kenya threatened to close the Dadaab camps and send home more than 360,000 Somali refugees within 90 days amid security fears in the wake of this month's Garissa University massacre by Somalia's Shebab insurgents in which 148 people died.

At least two people were killed and several others were injured on Sunday when a six-storey residential building collapsed in the Kenyan capital Nairobi, officials said.

Hospital officials said Monday they had treated 28 survivors pulled out of the rubble of the building, situated in Nairobi's Haruma neighborhood, but it remained unclear if others were still trapped.