Gunmen attacked Kenyan Deputy President William Ruto's residence on Saturday while he and his family were out, local television stations reported, 10 days before presidential and legislative elections.
Intermittent gunfire could still be heard at the home where more than eight Recce squad officers were leading the security operation.
Police and officials from Ruto's office were not immediately available for comments.
Uasin Gishu governor Jackson Mandago and MPs Oscar Sudi and Alfred Keter addressed villagers and asked them to remain calm and keep away from the area.
A police officer guarding the residence was wounded, KTN News reported.
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According to reporters on site, gunshots rented the air for the better part of Saturday (July 29) afternoon as police were reportedly battling the attackers.
The motive of the attack was unclear.
Specialist forces were deployed to find the intruder, who hid in an unfinished building, police chief Joseph Boinnet said in a statement. "The injured officer is undergoing treatment and is in a stable condition".
Reports indicate DP's wife Rachel Ruto and children were not at home at the time of the attack. Members of the public were barred from accessing the heavily guarded home.