"The victims were rushed to Wajir district hospital... One of the injured people succumbed to his bullet wounds," Wajir police chief David Kuria said.
No one claimed immediate responsibility for the killing late yesterday, the latest in a string of attacks along Kenya's border region with war-torn Somalia.
Somalia's Al-Qaeda-linked Shebab have launched attacks in the area, but the region has also witnessed weeks of revenge attacks between rival Somali clans, with at least 80 killed since May in fighting over land and grazing for livestock.
The Shebab have claimed responsibility for earlier attacks, saying they were in retaliation for Kenya's military presence in Somalia as part of the African Union force supporting the country's fragile and internationally-backed government.
In a separate attack, gunmen in Kenya's coastal Lamu district torched offices late yesterday of a conservation organisation in the latest raid on the restive coast, government officials said.
"They set ablaze the camp and also several vehicles, then there was also shooting between the attackers and police at the base," said government official Shahasi Abdalla, the local area chief.
The attack occurred late yesterday at Amu Ranch, some 16 kilometres (10 miles) west of the coastal town of Lamu, at a community-run wildlife reserve working to support local peoples, animals and traditional ways of life.
"No one was killed or wounded in the attack," Abdalla told AFP.
The ranch hosts offices of the Lamu Conservation Trust, which works to support marginalised communities and protect some 63,000 acres of coastal forest inhabited by elephants and buffalo.
But the unrest in the coastal region has already badly dented Kenya's tourist industry - a key foreign currency earner and massive employer for the country traditionally busiest times of the year.
