TULSA, Okla. (AP) - Rising ozone levels have prompted authorities to issue an ozone alert for northeastern Oklahoma.

The state Department of Environmental Quality issued an ozone watch on Sunday. The agency says concentrations of ozone are approaching levels of concern.

An ozone alert day was issued for the Tulsa area by the Indian Nations Council of Governments. If levels continue to climb, an Air Quality Health Advisory may be issued for the area.

Officials say people with lung or heart disease should be aware that increased pollution may cause them to experience adverse health effects.

Symptoms include chest pain, coughing, sneezing, nausea, headache and pulmonary congestion.

Active children, adults and people with respiratory disease such as asthma should limit prolonged outdoor exertion.