Several young people were involved in a fight outside an Invercargill fast food restaurant on Wednesday evening. (File photo)

A young boy has been taken to hospital following a fight at Burger King in Invercargill.

A police communications spokeswoman said officers were called to the Burger King on the corner of Elles Rd and Tay St after receiving a report of two groups fighting outside just after 5.30pm on Wednesday.

The officers who were first at the scene requested the support of on-duty detectives after a lot of blood was found outside the fast-food restaurant, leading police to believe someone had serious injuries, the spokeswoman said.

Police found two groups of youths had been fighting and no-one was owning up to anything, she said.

One boy in particular was bleeding a lot, but had only moderate injuries, she said.

Police had spoken to the other youths at the scene.

An ambulance communications spokeswoman confirmed one patient was taken to Southland Hospital with moderate injuries.