The United States has imposed movement restrictions in Kisumu as the country awaits the presidential petition verdict on Monday.
The court is expected to give a judgement on September 5 on whether to nullify the win of William Ruto as president-elect or to uphold it.
In an advisory on Thursday, the US said the ruling might occasion post-election violence.
" Election-related demonstrations and rallies regularly take place after elections, at times blocking key intersections and causing traffic jams," the US said.
"Demonstrations may occasionally be violent, requiring police intervention. Strikes and other protest activities related to economic conditions occur regularly."
The US said out of an abundance of caution, the U.S. Embassy has imposed movement restrictions on U.S. government personnel in Kisumu.
" The State Department reminds U.S. citizens of the continued need for sustained vigilance," the US said.