Three men have been injured after a homemade bomb-making project in a flat in Germany went wrong and exploded – destroying the property and leaving the trio hospitalised.

The incident took place in the town of Northeim, which is located in the north-western German state of Lower Saxony.

The three men have not been named, but two of them are reportedly 42 years old, while the third is 56 years old.

Two of the men were reportedly taken to hospital with serious injuries, while the third was treated for minor injuries.

The apartment was left devastated, and the damage was such that families in neighbouring flats had to be provided with temporary accommodation.

The police used sniffer dogs and searched the apartment and basement of the tenant, who is reportedly one of the 42-year-old men.

The police said they found gunpowder, Polish firecrackers and homemade pipe bombs.

The public prosecutor, named as Andreas Buick, said: “We are investigating causing an explosive explosion and violating the Weapons Act.”

It is currently unclear why the three men were trying to build a bomb, but the authorities have reportedly already ruled out terrorism.

Blood tests are currently being conducted and analysed in order to determine whether or not the three men were drunk at the time of the incident.

There have been no further updates on the health condition of the two seriously-injured men.

Locals were reportedly eventually able to return to their homes.