Two people have been rescued after falling into a tank full of chocolate at the Mars M&M factory in the US.

It’s unclear at this stage how the pair fell into the chocolate tank, understood to be employees, but emergency crews had to cut a hole in the side of the tank to get them out.

“One patient was transported by ground and one person was transported by helicopter,” Assistant Supervisor Nick Schoenberger of Lancaster County 911 Dispatch told CNN.

The extent of their injuries is not yet known.