The National Security Committee of Cabinet has held an emergency meeting in response to the siege taking place at a cafe in Sydney’s Martin Place.

Prime Minister Tony Abbott confirmed the briefing in a statement and described the hostage scenario as a “deeply concerning incident”.

• Hostage situation in Sydney’s Martin Place

The Coalition leader tried to allay public fear, saying law enforcement were “well trained and equipped” for the incident.

“This is obviously a deeply concerning incident but all Australians should be reassured that our law enforcement and security agencies are well trained and equipped and are responding in a thorough and professional manner,” Mr Abbott said.

“I have spoken with NSW Premier Mike Baird and offered him all possible Commonwealth support and assistance”.

Thirteen people are believed to be held hostage in the cafe.

New South Wales Premier Mike Baird said his thoughts and prayers were with the members of the public.

“All my thoughts and prayers are with those members of the public affected by the situation in Martin Place and the NSW Police who are trained to deal with these events,” Mr Baird said in a statement.

1/2 My thoughts and prayers are with those affected by the situation in Martin Place & NSW Police who are trained to deal with these events.

— Mike Baird (@mikebairdMP) December 15, 2014

2/2 I’ve spoken to Police Commissioner Andrew Scipione & have full confidence NSW Police are working effectively to resolve the situation.

— Mike Baird (@mikebairdMP) December 15, 2014