Six people are still unaccounted for after a container ship ploughed into a bridge in the US city of Baltimore.

The Francis Scott Key Bridge, collapsed into the Patapsco River sending people and cars plunging into the freezing water below.

In a video of the incident, the Singaporean owned ship appears to lose power twice as it approached the bridge and issued a mayday call.

New Zealander Scott Preston is a former journalist who has been living in Baltimore for 11 years.

He says the loss of the bridge will have huge impacts for years to come.

Preston spoke to Charlotte Cook.