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.

U.S. Secretary of State John Kerry arrived in Kenya on Sunday for talks on security cooperation and ahead of U.S. President Barack Obama's visit to his late father's home country.

The trip to the east African nation is the first high-level visit since 2012, and comes after years of tensions surrounding Kenyan President Uhuru Kenyatta being charged by the International Criminal Court for crimes against humanity.

Kenya's interior minister on Thursday admitted that intelligence was ignored and the security response botched regarding the Islamist massacre of nearly 150 people at Garissa university in April.

Security should have been "beefed up" but was not, and once the attack began a "lack of coordination" undermined the response, Interior Minister Joseph Nkaissery told a parliamentary committee.

Kenyan road safety authorities have threatened to charge injured pedestrians with attempted suicide in a bid to halt a rise in road accidents in the east African nation.

The warning came as police revealed road fatalities were up 10 percent this year, with jaywalkers accounting for nearly half those killed.

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.

All four gunmen from Somalia's Al-Qaida linked Shebab who carried out the Kenyan university massacre earlier this month were Kenyans themselves, reports said Thursday.

The militants attacked the university in the northeastern town of Garissa on April 2, lining up non-Muslim students for execution and killing 148 people in what President Uhuru Kenyatta described as a "barbaric medieval slaughter".

Kenyan youths have begun construction of a security barrier along the vast and porous border neighboring war-torn Somalia, although critics have dismissed the project as infeasible, reports said Thursday.

The proposed barrier is the latest in a string of measures Kenya has announced to stem attacks by Somalia's Al-Qaida-linked Shebab insurgents in the wake of a university massacre in the northeastern town of Garissa.

The United Nations warned Kenyan authorities Tuesday that closing the world's biggest refugee camp complex would have "extreme humanitarian and practical consequences" and would violate international law.

On Sunday, the Kenyan government said it had asked the U.N. refugee agency to repatriate hundreds of thousands of Somali refugees from the sprawling Dadaab refugee camp by July in the wake of the Garissa University massacre claimed by Shebab insurgents from Somalia.

A panicked student was killed and 150 more were hurt in a stampede at a Kenyan university campus when an electrical blast sparked fears of a new Islamist attack.

Some students jumped from the hostel from as high as the fifth floor at the University of Nairobi campus after the pre-dawn explosion, vice-chancellor Peter Mbithi told AFP.

Kenya said it has asked the U.N. refugee agency to repatriate hundreds of thousands of Somali refugees by July in the wake of the Garissa University massacre.

"We have asked the UNHCR to relocate the refugees in three months, failure to which we shall relocate them ourselves," a government statement quoted Vice President William Ruto as saying in a speech Saturday.