The four attackers responsible for killing at least 67 people at a Kenyan shopping mall may have escaped due to lax security, according to a New York police report released Tuesday.

The victims aged eight to 78, from 13 different countries, were killed at the Westgate mall in Nairobi during a terrifying assault claimed by Somalia's al-Qaida-linked Shebab terror group.

Gunmen killed eight Kenyans including five policemen Tuesday in an ambush in the troubled northeast border region close to war-torn Somalia, police said.

Insurgents sprayed a police patrol with gunfire near the border town of Liboi, also leaving some officers badly wounded, in the latest in a string of attacks in the restive region.

Dozens of people have died in northern Kenya in a week of fierce clashes between rival ethnic groups, aid sources and reports said Saturday.

The unrest, centered around the town of Moyale in Marsabit county on the frontier with Ethiopia, has seen villages burned down and many families forced to flee over the border.

Venezuela's embassy in Kenya used diplomatic bags to smuggle drugs, a witness in a trial over the murder of the mission's ambassador told a Nairobi court Wednesday.

"I am aware that the embassy was used to traffic drugs using the diplomatic bag," former embassy driver Kevin Lameck told the court in the Kenyan capital.

The International Criminal Court's chief prosecutor on Monday accused Kenya of failing to hand over records which she said were "relevant to critical issues" in President Uhuru Kenyatta's crimes against humanity trial.

"The Office of the Prosecutor requests the Chamber to find that the Government of Kenya has failed to comply with the April 2012 request to provide financial and other records of the accused," Fatou Bensouda said in papers filed before the Hague-based court.

The vast majority of Somali refugees in Kenya fear returning to their war-torn country, Doctors Without Borders said Thursday, warning aid must continue despite a recent deal for refugees to go home.

Despite living in often appalling conditions in the world's biggest refugee complex of Dadaab -- home to over 400,000 mainly Somali refugees -- at least four out of five are too frightened to go back to Somalia, according to assessments by the medical aid agency MSF.

The International Criminal Court on Tuesday reversed a ruling that allowed Kenya's President Uhuru Kenyatta to attend only parts of his trial, saying the African leader "as a general rule must be present" in court.

"Any future requests to be excused from attending parts of his trial will be considered on a case-by-case basis," The Hague-based ICC said in a statement.

Kenyan police said Monday that calm has been restored in a village in the country's northwest following a siege by armed militiamen from a rival community.

Militiamen from the Pokot tribe had last week surrounded the village of Lorokon, home to the rival Turkana community. They seized three police stations and put up heavy resistance against police sent to the area.

Police in Kenya launched operations Sunday against armed militiamen who have laid siege to a village in the country's northwest amid a border dispute between communities.

A day earlier, militiamen surrounding the village of Lorokon, home to the clashing rival Pokot and Turkana communities, seized three police stations and put up "heavy resistance" against police sent to the area, authorities said.

Armed militiamen on Saturday laid siege to a village in northern Kenya where they also seized three police posts, amid a territorial dispute between local communities, Kenyan authorities said.

"Armed militiamen believed to be from the Pokot community are holding three police camps hostage in Lorokon village, Turkana county," said the National Disaster Operations Center in a tweet.