US President Barack Obama's grandmother, Mama Sarah Obama, sustained bruises during a road accident at Otonglo on the Kisumu-Busia highway at the weekend.

The accident, which took place on Saturday around 9pm, is reported to have occurred after the driver lost control of the vehicle she was in while trying to overtake another.

According to a witness, Mr Dennis Owuor, some residents rushed to the scene after hearing a loud bang at night.

"When we came to find out what had happened, we discovered that a car had rolled and soon there were a number of police officers at the scene," he said.

Mr Owuor said that the quick response to a "minor accident" made them suspect that a prominent person had been involved.