SELDEN - Suffolk County police say more than two dozen people fell sick Tuesday at a doctor's office in Selden due to high levels of carbon monoxide.

The incident occurred just before 11 a.m. on Boyle Road.

Police say people inside the Selden building were evacuated. Three were taken to the hospital to be evaluated. They are expected to be OK.

There is no word yet on what caused the carbon monoxide exposure.