According to Jane Mbugua, when did the attack occur?

Early Friday morning an assailant reportedly threw a grenade or some form of explosive device into a Kenyan police vehicle which exploded, injuring those inside. Kenyan police have confirmed the attack killed one of the officers inside, injuring one and leaving two others in critical condition.
    Reports indicate that no bystanders were injured in the attack. A local hairdresser, Jane Mbugua, was nearby when she heard the explosion.
    Mbugua said the attack occurred around 8:30 am. She rushed to the scene where she found the injured officers lying on the side of the road next to the damaged vehicle. The officers were later rushed to a Nairobi hospital.
    Police are now trying to determine the identity of the attacker. The motive of the blast is currently unclear, but Administration Police Commandant Kinuthia Mbugua said the attack could be the result of terrorism.
    Kenya is no stranger to terrorist attacks. In 1998 the US Embassy in Nairobi was hit by a truck bomb which killed hundreds and injured thousands more. The attack was carried out by local al-Qaida operatives, who simultaneously bombed the US Embassy in neighboring Tanzania.