Spanish bank shares recovered from pressure that followed the central bank's confirmation that a banking audit would be delayed until September.

WSJ: Europe Stocks Rise

Authorities later announce that they recovered a pressure-cooker bomb after the pursuit into Watertown, a source briefed on the ongoing investigation said.

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Officials said a circuit board and battery pack - parts of a triggering mechanism - had been recovered and the lid of a pressure cooker, apparently blown off during the explosion, was found on the roof of a nearby building.

BBC: Boston Marathon 'bombing suspect' seen on video