Two South Australian men charged with deliberately lighting bushfires have faced court.

Key points: Two men have faced SA courts charged with deliberately lighting bushfires

Two men have faced SA courts charged with deliberately lighting bushfires One man allegedly started them at Aldinga Beach and the other at Rosetown, near Kingston

One man allegedly started them at Aldinga Beach and the other at Rosetown, near Kingston The courts suppressed their identities

A 31-year-old Reynella man charged with deliberately starting two bushfires at Aldinga Beach last month did not apply for bail in the Christies Beach Magistrates Court this afternoon.

He is also charged with two acts to endanger life and failing to truly answer questions.

His identity was suppressed by the court.

The two grass fires started in scrubland on a severe bushfire risk day at Aldinga Beach Road and the Esplanade on December 28.

Police said the man's vehicle was seized for forensic examination and investigations were continuing.

The man is expected to appear in the Adelaide Magistrates Court again in October.

Another man charged over starting fires in South-East SA

Separately, an elderly man charged with four counts of starting bushfires in the South-East has been remanded in mental health custody until May.

A magistrates' court hearing in Mount Gambier this afternoon was told the man was yet to be psychologically assessed, but was believed to have dementia.

His identity was suppressed.

Police said the man lit fires around Rosetown, near Kingston, on Monday, Thursday and Saturday.

No properties were damaged in the fires, however police say a house came under threat during one of the fires on Saturday.

Police said the charges were not connected with a fire at Keilira last week, which was not considered suspicious.