Police probe early morning blast at Portland food cart area

PORTLAND, Ore. (AP) — Authorities suspect a propane tank was the source of an early morning explosion among a group of food carts in downtown Portland on Sunday.

The blast reported at about 3:40 a.m. shattered a large number of windows in the surrounding block, the Portland Police Bureau said.

Officers searched the area but found no one with any injuries.

Area streets were temporarily closed as a bomb squad swept the area for potential explosive devices.