A bus carrying more than 45 people crashed around 1:30 a.m. EAT.
He also added that 30 people were seriously injured and that others with minor injuries had received medical treatment at Magunga hospital,Korogwe.
The driver of Burudani bus,Luta Lover (35) believed to be among the twelve people killed.
Traffic police are currently attempting to establish the cause of the accident.