Nairobi Mosque Attack Toll Rises to Five

Two more people died of their wounds Saturday following a grenade attack near a Nairobi mosque, bringing the toll to five and heightening security concerns three months before Kenya goes to the polls.

"Two more people have died in hospital, the death toll is now five," Nairobi Police Chief Moses Nyakwama told Agence France Presse, updating an earlier toll of three.

A grenade was hurled at worshipers leaving a popular mosque minutes after the end of evening prayers on Friday, according to police and witnesses.

"We have sent more officers on the ground to ensure there is peace," Nyakwama said.

Police had to break up groups of protesters who had spontaneously taken to the streets on Friday evening to vent their anger.

The incident was the latest in a string of attacks to rock Nairobi's Eastleigh neighborhood, which is home to a large Somali ethnic population.

It follows a roadside bomb explosion also in Eastleigh district on Wednesday evening, that killed one person and wounded eight others, as well as a bomb on a bus last month that killed nine.

Kenya has suffered a string of attacks often blamed on Al-Qaeda-linked Shebab militants since it invaded Somalia last year.

Kenyan troops, now integrated into an African Union force, seized the Shebab bastion of Kismayo in September, a key southern Somali port, prompting warnings of retaliation from both the insurgents and their Kenyan supporters.

The Shebab have denied involvement in previous similar bombings.