The 8.30 pm incident comes after Fridayโs attack on Mandera Governor Ali Roba that left three people dead, two of them policemen.
Police on Sunday night said the four were not residents of the town. Mandera East Deputy County Commissioner Elvis Korir said he could not give any more details as police were still investigating.
The attack comes as police are on the spot over conflicting reports on the Friday attack on Governor Roba and also the security situation in the country.
The identity of the Friday attackers and their motive is yet to be established and reports that a major terrorist attack targeting a mall in Gigiri, Nairobi, was thwarted, cannot be confirmed.
Inspector-General of Police Joseph Boinett on Sunday said the gunmen who attacked Mr Robaโs convoy might have been bandits, not terrorists. The attackers, reported to number about 30, sprayed two vehicles in the convoy with bullets and burnt another.
Mr Boinett, who visited Mandera on Saturday, said he was briefed on the security arrangements in place prior to the attack as well as measures to prevent a similar occurrence.
DUALE REJECTS REPORTS
Meanwhile, National Assembly Majority Leader Aden Duale has dismissed media reports attributed to him that the government was willing to negotiate with Al-Shabaab. Mr Duale reportedly said Kenya was ready to send elders and religious leaders to lead the negotiations.
โIf you want us to send you elders, and religious leaders we will do so. If you want us to send you political leaders, we will do so. Just tell us where we should come to meet you but give Kenya a wide berth,โ he said on BBC Somali.
Speaking by phone Sunday, Mr Duale said his message was directed to Somali leaders.
Mr Duale also denied the claims on social media, saying the country had never and would never negotiate with terrorists, bandits, militants and drug dealers.
In Nairobi, police could not confirm reports that a joint security team conducted a successful operation on Friday afternoon and two people carrying military-grade explosives were arrested on their way to a mall in Gigiri.
Source-nation.co.ke