Immigration police will review the visa of a Swiss national at the centre of an assault case in Phuket, said deputy Phuket governor Adul Chuthong.

Mr Adul said Urs Fehr, also known as David, has a visa that is set to expire on March 13. The Swiss man operates a number of businesses in Thailand and has a registered foundation under his name.

Mr Fehr came under scrutiny after he was reported by 26-year-old Thandao Chandam, a doctor at Dibuk Hospital, for assault after he kicked her and her friend in their backs as they sat on the beach in front of the villa rented by him on Feb 24.

He claimed the pair were trespassing on his property, but an investigation found the steps were built on public land.

Mr Adul said Mr Fehr had been given 30 days to remove them.

If he does not, local authorities will remove them and charge him the cost of the work, he said.

Mr Fehr has been charged with assault, but the incident has led to calls for a thorough investigation into his property and businesses.

Meanwhile, the Phuket Times on Monday posted a message on social media from Dr Thandao, who thanked the public for giving her support.