The Australian Border Force has raided a home in Sydney’s south amid reports that nuclear isotopes were found in the premises.

The force made this known on Thursday, noting that its officials were at Kelsey Street in Arncliffe, to execute a search, when they discovered the potentially hazardous materials.

It also confirmed that the search was carried out with the support of New South Wales emergency services.

A spokesperson said “all appropriate safety measures are being implemented”.

“People in [the] vicinity of the location are urged to follow all directions from emergency services,” the spokesperson said in a statement.

The apartment block on Kelsey Street remained cordoned off with “hot zone” warning tape on Thursday afternoon and border force officers were inside the property behind a gated area at the entrance to the units.

Meanwhile, Neighbours told reporters that they are in the dark about the details of the operation.