It's back to normal at LaGuardia Airport after an unknown substance was found Wedenesday morning.
The Transportation Security Administration says a carry-on bag was inspected after an alarm went off at a security checkpoint in Terminal B around 6:30 a.m.
A white powdery substance was discovered inside, causing the checkpoint to close for about half an hour.
It was later determined the powder was some kind of food or spice and not harmful.
Three TSA agents were taken to the hospital as a precautionary measure.
The terminal was not evacuated.