A person was treated for injuries following multiple explosions at a block of flats in Pakuranga, east Auckland.

A garage in Latham Ave was engulfed by flames following the blasts just before 2pm.

Seven fire trucks and an ambulance responded to the scene, with 20 firefighters tackling the blaze.

SHARP FOCUS MEDIA Twenty firefighters tackled a blaze which engulfed a garage in Pakuranga.

St John ambulance spokesman Robbie Walker said one person was treated for moderate injuries at the scene, but did not require hospitalisation.

Multiple people had made calls to 111.

"Still dozens of 111 calls being received. Explosions can be heard over phone," the Fire Service communications centre tweeted at 2pm.

PHIL TAYLOR/FAIRFAX NZ Rubbish collectors Taylor Riwhi, left, and John Milner tried to fight the blaze with a fire extinguisher.

A dozen police officers were at the scene and about 50 people from surrounding properties were standing in the street watching.

The fire had begun in a garage attached to two units. A burnt-out car was visible in the garage and there was damage to the front-facing unit.

A neighbour, who did not want to be named, said he heard a series of explosions before the fire began.

SHARP FOCUS MEDIA A burnt-out car could be seen in the garage following the blaze.

"I heard boom, boom, boom," he said.

The man said a neighbour from across the street came over to tell him to get out of the house "to be safe".

He said it was not the first time neighbours had heard exploding noises. A similar incident had occurred "years ago" with previous tenants of the property.

Envirowaste contractors Taylor Riwhi and John Milner had collected the rubbish in Latham Ave about 10 minutes before the explosions.

They said they had not seen anything suspicious at the time.

While on Pakuranga Rd, the pair saw thick black smoke coming from the street and decided to return.

They attempted to tackle the blaze with a fire extinguisher, but it proved too big.​

A police officer at the scene said authorities were investigating the cause of the fire, which was extinguished by 3pm.