New York City’s transit authority is understandably jumpy about the Galaxy Note 7. A week or so after the FAA issued a strongly worded warning asking travelers not to check or fly with Samsung’s new phablet, the MTA is following suit.

The organization hasn’t officially banned the device, but it has issued the following warning over social media this week:

The MTA was quick to add that, while no official cases of exploding Galaxy devices have been reported on its subway lines or buses, passengers are urged to, at the very least, power down their devices before traveling.

For its part, Samsung issued a recall of the devices earlier this month, after 35 incidents were reported globally.