(WSB photos, added 2:58 am)
1:59 AM: Now Seattle Fire is at the scene of a reported “room fire” inside what sounds like one of the vacated buildings at the future 3210 California development site (former Cayce/Gain offices). More to come.
2:24 AM UPDATE: We are at the scene. Fire out, no injuries. It *was* in the back of the vacant, awaiting-demolition ex-Cayce/Gain/Cometa building. No cause yet and no one will speculate on any connection to those earlier dumpster fires a few blocks north. Many of the units are leaving, but the street will be blocked a while longer.
10:30 AM Police now say via SPD Blotter that they are indeed investigating this fire and two Dumpster fires as arson and are seeking tips.