2.15PM: Fire fighters worked to secure the leak and the scene has been declared safe.
An operation is underway in Narrabri to evacuate parts of the CBD after a gas leak on Tuesday afternoon.
Emergency services were alerted after a 10,000 litre LPG tank started leaking shortly before 1pm.
Fire and Rescue NSW confirmed the Coles Supermarket had been evacuated and staff and students at a nearby school and TAFEcollege are also being asked to leave.
A large exclusion zone is being set up with businesses evacuated as hazmat crews try and control the leak.
Barwon St is closed to traffic and a number of diversions have been set up.
More news in tomorrow's edition of The Leader.