A New Zealand woman was "high on ice", yelling and "talking a lot" when she was arrested at a Bali airport, local officials allege.
Myra Lynna William, 27, was hauled before reporters at Denpasar on Friday, two days after she was arrested getting off a flight from Melbourne to Denpasar.
"While she's in the immigration checking point, she behaved unnaturally, talking a lot, yelling and very impatient to get stamped," head of Denpasar Immigration office Yosep Renung Widodo told reporters.
When she was taken into a room to be checked down, he alleged a plastic pouch with a crystal substance fell to the ground.
Police allege forensic testing confirmed it was 0.43grams of crystal meth.
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A urine test also allegedly tested positive for methamphetamine, marijuana and ecstasy, they say.
Ms William has been named a suspect, who police allege admitted consuming the drug ice before flying to Bali.
According to police she told them she had been taking drugs for eight years.
It is expected she will be charged with drug possession, which carries a penalty of four to 12 years in jail and a fine of up to 8 billion rupiah ($A800,000).
