An explosion in Auckland that left a man with a foot injury may have been caused by a large firework, police say.

A number of residents were woken by the noise, coming from a property on Sandringham Road at Mount Eden just after 6am on Saturday.

The man was admitted to hospital for treatment to his foot injury.

A deck at the rear of the property was damaged and debris landed on the platform of the nearby Kingsland Train Station.

Police believe the explosion came from a large firework at the address, though the investigation is continuing.

A spokesman said Auckland Transport was not aware of any damage to trains or platforms from the incident - with Kingsland station not in use today.

"There is scheduled maintenance on the western line today so trains have been replaced with buses, the platforms at Kingsland were not being used this morning," the spokesman said.

A number of residents were woken by the noise but police reassured the public that there were no ongoing safety concerns relating to the matter.

Police are speaking to all witnesses and to the individuals believed to have been involved in the incident.