A woman has been accused of falsely reporting a terrorism plot targeting a plane at Sydney’s international airport.

The 30-year-old, from Blacktown, allegedly contacted police on March 21, claiming to have overheard a conversation at Kingsford-Smith, where three people had discussed committing an act of terrorism.

An assessment of the threat was made by several agencies and deemed to be a hoax.

Following an investigation by officers from the Joint Counter Terrorism Team, the woman was located on Sunday at Wentworthville, charged with suppling false information and refused bail.

Police said she appeared at Central Local Court on Monday and would remain in custody until reappearing on Thursday.