The culprits broke into the house, poured petrol on the bed on which both the sisters were sleeping and set them on fire.
Uhuru Kenyatta won a second term as president of Kenya in this week's election, the electoral commission said on Friday amid opposition claims of fraud.
At least 17 fighters were killed from both pro and anti-government forces in a fierce battle that erupted on Friday evening in northern Yemen.
The US President Donald Trump said on Friday he would not rule out a "military option" in Venezuela.