Route 20 in Darien is closed for an accident involving a tractor-trailer that hit at least one utility pole.
A second truck apparently became entangled in low-hanging power lines following the initial accident.
The driver of that truck has been instructed to stay in his cab pending arrival of National Grid.
Two utility poles are down.
The first truck may be transporting some sort of radioactive material, perhaps used in X-rays.
Darien Fire Department is on scene.
Alexander fire has Route 20 shutdown at Route 98.
UPDATE 12:39 a.m. : A chief informs dispatch, "we have power lines down on both sides of the road and a truck in the middle of the road that is energized. We're really not going to be able to do anything until National Grid gets here. No ETA for National Grid.
UPDATE 5:41 a.m.: Route 20 is being reopened.
