Counter-terrorism police conduct Sydney raids

Police have carried out a series of counter-terror raids in Sydney's southwest.

The Joint Counter Terrorism Team Sydney said a number of search warrants were executed as part of Operation Duntulm this morning.

The AFP did not provide any more details about the "investigative operation" but said further details would be provided in due course.

Operation Duntulm focuses on foreign incursion offences.

It has also resulted in Fatima Elomar being arrested after she was stopped at Sydney Airport when she tried to board an international flight with her children last May.

She was later charged with supporting incursions into a foreign state with the intention of engaging in hostile activities.

Australia's terror alert level is currently high, meaning a terrorist attack is likely.

Eleven people have also been charged under another counter-terror investigation, Operation Appleby, which has targeted a nameless group of up to 20 people who sympathise with militant group Islamic State.

Today's raids come as Sydney continues to grieve for Katrina Dawson and Tori Johnson who were killed in the Lindt Cafe siege in December.

In recent weeks, police have raided homes in Marsfield, Regent's Park and Condell Park as part of ongoing counter-terrorism investigations.

Sulayman Khalid, 20, was charged with plotting a terrorist act after being arrested last month. Police allege he was part of a group plotting to target an AFP building and carry out guerrilla warfare in the Blue Mountains.