Kenya announced its first confirmed case of coronavirus on Friday, saying a woman who returned from the United States tested positive for the illness in Nairobi.

More than 30 people died when a tanker carrying flammable materials crashed into other vehicles and burst into flames outside the town of Naivasha in Kenya late on Saturday, officials said.

Security agencies are killing and abducting men in north-east Kenya suspected of links to Islamist extremists, a rights group said Wednesday, as police challenged them to provide evidence to an independent body.

Six people were killed on Friday when suspected Islamist gunmen fired on two buses in Kenya's far northeast close to the Somalia border, police said.

At least two protesters were shot dead in Kenya on Monday as anti-government protests turned violent, with police opening fire to disperse demonstrators in the country's third biggest city, Kisumu.

Kenya's opposition CORD alliance has been staging weekly protests every Monday but one since late April to demand a shake-up of the country's electoral commission ahead of presidential elections in August next year.

Kenyan police used tear gas and water cannon on Monday to disperse opposition supporters demanding a change of leadership at the electoral commission ahead of a vote due next year.

Local media reported at least one killed in Kisumu in the west of the country, while police in Nairobi and the second city of Mombasa fought running battles with small groups of protesters.

The U.N. Security Council said Friday that Kenya's president assured them he will abide by international obligations despite a decision to close the world's largest refugee camp and send Somali refugees home.

Kenya hosts around 600,000 refugees, some of whom have lived in the country for a quarter of a century, but the interior ministry this month said it would refuse new refugee arrivals and shut the sprawling Dadaab camp citing security fears.

Kenya's plan to close the world's largest refugee camp and send Somali refugees home has sparked fear among some of those who have sought shelter in Kakuma camp in Kenya's north-west.

"If we are chased away from this place I cannot go back home to Somalia," said Momina Omar Semboka, 39, a refugee in Kakuma who comes from Kismayo in southern Somalia.

Refugees from Somalia will no longer be accepted in Kenya, the government said Friday citing security fears.

"The Government of the Republic of Kenya, having taken into consideration its national security interests, has decided that hosting of refugees has to come to an end," said a statement signed by interior ministry official Karanja Kibicho.

Israeli Prime Minister Benjamin Netanyahu on Tuesday pledged his country's cooperation with African nations against "terrorism" as he met Kenyan President Uhuru Kenyatta.

"Israel is willing and prepared to work with African countries in our common battle against militant Islamic terrorism," Netanyahu said as he went into talks with Kenyatta, whose country has long been a strategic ally of Israel.