Authorities are actively searching for three masked robbers following an unusual home invasion incident in the area south of Adelaide.

Investigators report that around 8.30am on Saturday, three men, clad in black attire and hiding their faces, showed up at a residence in Port Noarlunga South.

According to the police, one individual remained outside, while the other two entered the premises, purportedly equipped with capsicum spray and something resembling a small bat.

The pair are alleged to have threatened four people inside the home, and assaulted three of them, one of whom was pregnant.

The victims were left with minor injuries.

The men allegedly stole two wallets and a PlayStation 5.

A neighbour heard the commotion and turned on her CCTV camera just in time to capture the suspects making their escape.

In a somewhat bizarre getaway scene, all three of the suspects piled onto the same scooter.

In the scooter driver’s attempts to make a quick exit, one of the suspects almost fell off the back of the vehicle. 

Police describe the getaway vehicle as a black and silver scooter, similar to a Yamaha NMAX 155.