Brett Molina

USA TODAY

Police departments are warning iPhone users to ignore posts urging them to say "108" to Apple's digital voice assistant Siri.

Some of the posts tell users to say "108" to Siri, then close their eyes. When a user says "108" to Siri, it automatically dials local emergency services. The posts ask users to close their eyes because there is a five-second window where a user can press cancel, in case a call was placed accidentally.

The prank has prompted police departments to post warnings on Facebook and Twitter urging iPhone owners not to fall for it.

The number "108" is used to dial emergency services in India. It's equivalent to saying "911" to Siri in the U.S. It's a feature allowing iPhone users to call emergency services using the digital voice assistant.

"If 9-1-1 operators are trying to answer these calls, that means that a real emergency call might not be answered as quickly as it needs to be answered," reads a post from the Facebook page for the police department in Lewistown, Pa.

Apple had no comment.

Follow Brett Molina on Twitter: @brettmolina23.