Cleaners found a stash of 24 gold bars worth more than $1.1 million hidden in an airplane lavatory after a flight from Bangkok landed in eastern India, officials said Wednesday.

The Jet Airways flight had landed in Kolkata and was being cleaned before a scheduled flight to Patna when the cleaners found two bags with the gold stashed inside, Customs official Mona Priyadarshini said.

Priyadarshini said the gold bars weighed around one kilogram each.

Customs officials confiscated the stash and are investigating.

India is one of the world’s biggest consumers of gold.

The government increased the gold import duty recently, which officials say has encouraged smuggling.