At least three people have died in a gun and grenade attack on Wajir town in northeast Kenya, the latest in a series cross-border raids by Somalia's Shebab militants, officials said Wednesday.

Security sources said four armed men threw a grenade at a small shop in the town centre on Tuesday night. They also opened fire before escaping on foot.

Somalia's Shebab militants have killed one man and wounded three others in a shooting in the northern Kenyan town of Mandera, officials said Monday.

The latest cross-border attack by Somalia's al-Qaida came two days after it ambushed the local governor's convoy.

Three people were killed and eight more wounded on Friday in the latest cross-border raid by Somalia's Shebab militants in northeastern Kenya, an official said.

Grenades and gunfire were aimed at a convoy carrying Mandera county governor Ali Roba, leaving two police and a civilian dead, although Roba escaped unharmed, Mandera East deputy county commissioner Elvis Korir said.

The Kenyan government was back under pressure Sunday over its alleged failure to deal with worsening insecurity following the execution-style killing of a prominent MP in the city center.

George Muchai, a member of Kenya's governing Jubilee coalition and well-known trade unionist, was returning home in the early hours of Saturday after a night out in a restaurant when he was shot dead along with his driver and two bodyguards by masked men with assault rifles.

A prominent Kenyan MP was shot dead along with two bodyguards and a driver in the center of the capital Nairobi in the early hours of Saturday, police and medics said.

Detectives said George Muchai, a member of Kenyan's governing Jubilee coalition, was returning home after meeting family members in a restaurant when the execution-style attack by masked men with assault rifles took place close to Nairobi's central business district.

Kenyan police fired tear gas Monday at children protesting against the seizure of their school playground by a property developer.

Around 100 primary school children and a small group of activists pushed over a newly built wall that separated playing fields and the school buildings, close to the capital Nairobi's main domestic airport.

One Kenyan soldier and five suspected Islamists insurgents loyal to Somalia's al-Qaida-affiliated Shebab fighters were killed in a battle in Kenya's coastal Lamu district on Wednesday, the army said.

Kenyan troops, part of the U.N.-backed African Union force in Somalia fighting the Islamists, were traveling northwards close to the Somali border when they were attacked.

East African foreign ministers met in Mogadishu on Saturday to push peace efforts in war-torn Somalia, the first time the regional bloc has met in the country for almost three decades.

Dozens of heavily armed soldiers and police patrolled the streets, where Al-Qaeda-affiliated Shebab militants regularly carry out bombings and killings.

A Kenyan businessman found murdered last week was "deeply implicated" in corrupting witnesses in the International Criminal Court's case against Vice President William Ruto, the court's prosecutor said on Friday.

Meshack Yebei, described by Ruto's lawyer as a "critical" witness for the politician's defence case, was found dead -- and badly mutilated according to some reports -- on January 4 in western Kenya's Nandi district.

Furious Kenyan villagers said they wasted a day waiting for a "witchdoctor" to bring a corpse back to life after he failed because he was too "tired", a report said Friday.

Scores of villagers in Kenya's southeastern Kwale district turned up singing and dancing to see the "miracle", Kenya's The Star newspaper reported.