"There was an attack with one fatality and injuries," regional police chief Charlton Mureithi said, without elaborating.
on condition of anonymity, a Mandera police officer said that gunmen
stormed the police station and "opened fire indiscriminately".
"We have lost one of our colleagues," the source said, adding that "about four" others suffered serious injuries.
No one has yet claimed responsibility for the attack overnight Saturday.
has seen a series of bomb blasts and shootings since sending soldiers
into Somalia to fight Al-Qaeda-linked Shebab insurgents in October 2011.
latest attack came just hours after the Kenyan government said it
planned to deploy troops to the Mandera region following recent deadly
clashes between rival clans in the region.
Police reinforcements have also been announced.