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The Brent Bravo platform. Image courtesy of Royal Dutch Shell.

Royal Dutch Shell recovered a large container that fell from a crane and threatened nearby pipelines in the UK North Sea on Sunday.

The container was being moved from the Brent Alpha platform onto a support vessel when it slipped and landed dangerously close to a subsea pipeline network that connects to the Far North Liquids and Associated Gas System (Flags) pipeline, the Evening Express said.

Shell evacuated 54 workers from the Brent Alpha platform Monday.

28 workers stayed on Brent Alpha and 18 were transferred to the nearby Brent Bravo, Charlie and Delta platforms.

An additional 36 workers were taken to Aberdeen, Scotland.

Brent Alpha and Brent Bravo, an adjacent platform, were depressurized and shutdown Monday as a precautionary measure.

Normal operations are being restarted at the platforms, Upstream said.

Shell has not disclosed when all of the evacuated workers are expected to be back on the platform.

A mechanical failure is thought to have caused the accident.

The Brent Alpha platform is located about 115 miles northeast of Lerwick, Scotland.

The UK Health and Health and Safety Executive and Maritime and Coastguard Agency were informed of the incident.