Two people were threatened with a firearm during a home invasion 25km west of Penola on Saturday afternoon.

Police were called to a home in Short after four men attended the home and threatened the occupants.

“About 5.20pm on Saturday police will allege that four men attended a home in Short armed with a firearm and threatened a man and woman residing there,” a SAPOL spokesperson said.

“The group stole mobile phones, cash and a motorbike from the address.

“One of the suspects rode off on the stolen motorbike and was last seen heading east on Clay Wells Road.

“A short time later, the stolen motorbike was involved in a crash at the intersection of the Riddoch Highway and Clay Wells Road, Penola.

“The motorbike rider left the scene but the 24-year-old Mount Gambier man was later arrested by police.”

Following investigations, a 20-year-old man from Mount Gambier was also arrested over the robbery.

The two men were charged with possessing a firearm without a licence, endangering life and aggravated robbery.

They were refused bail and Limestone Coast police are making further enquiries in relation to the two outstanding suspects.

Meanwhile, a man has been arrested following a house fire in Mount Gambier on Saturday evening.

Police and fire crews were called to Hosking Avenue just after 7.30pm after reports a house was on fire.

A SAPOL spokesperson said on arrival the crews found a front bedroom fully ablaze.

“Neighbours in the nearby properties were evacuated and luckily there were no reports of injuries,” the spokesperson said.

“Fire crews extinguished the blaze but there was significant damage to the building.

“Following investigations a 42 year-old man from Mount Gambier was arrested.”

The man was charged with arson and refused police bail to appear in the Mount Gambier Court.

Fire cause investigators from Adelaide on Sunday attended the scene to further investigate the blaze.

Anyone who saw or heard any suspicious activity or has any information that may assist the investigation is asked to contact Crime Stoppers online at www.crimestopperssa.com.au or via phone 1800 333 000.

In other police news, two Naracoorte men were caught drink driving on Saturday afternoon.

Police stopped a Volkswagen sedan on the Riddoch Highway just after 3pm as checks revealed the car was unregistered.

The driver was breath tested and allegedly produced a blood alcohol reading of 0.165.

A 35-year-old man from Naracoorte was reported for drink driving and issued with a 12-month immediate loss of licence. About an hour later, police stopped the same Volkswagen on the Naracoorte-Bordertown Road, Bordertown.

A different driver was breath tested and he also returned a positive result, recording a blood alcohol reading of 0.085.

A 42-year-old Naracoorte man was reported for drink driving and issued a six-month immediate loss of licence number. Both men will be summonsed to appear in court at a later date.

Meanwhile, police are not stating the reason why six armed plain clothes officers were gathered on the footpath outside the Millicent station at 8am on Friday.

The out-of-town male and female officers wore vests with police insignia and they parked their unmarked vehicles outside the station in George Street.

After a short period of time, they were admitted to the building by a uniformed Millicent police sergeant.