SALEM, N.H. (AP) – Authorities were waiting for test results on the contents of an envelope that made employees of a hotel light-headed.

The letter arrived at the Red Roof Inn Friday morning. After opening it, some employees felt a burning sensation and became light-headed. They were checked out at the scene and not taken to the hospital.

A HAZMAT team tested the air and sent the samples and the envelope the State Public Health Lab for further analysis.