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Update (10:40am 11/13/13): In a 10:30am press conference, Medford Police Chief Tim George said "The DAs office receives threats on a regular basis, but it is very unusual to have an actual attack. We had no prior knowledge of this attack. We are pulling resources from the Seattle and Portland areas, so this will be going on for a while."
Update (10:04am 11/13/13): "It's clear this was a targeted attack" says Medford Police Lt. Mike Budreau. Medford Police confirm that an IED attached to a propane tank was partially detonated. He says it would have been much worse had the propane tank exploded.
Update (8:35am 11/13/13): Courts will be closed until noon as a result of the explosion at the District Attorneys office. Police are calling the damage "extensive" after a "targeted" attack. A homemade explosive device detonated shattering windows.
No motive, no suspect or suspects in custody at this time. ATF, FBI and police investigating.
Area around West 10th street and Laurel Street are closed and will be for several more hours.
An explosion at the District Attorneys office in Medford was reported around 4:30 am. Police have confirmed there was in fact an explosion, they are not giving damage estimates.
At this time we know that one improvised explosive device, either on or next to a propane tank, did in fact detonate.
We are told windows shattered and there may be another device as well. Police continue combing the scene and looking for a suspect.