WEATHERSFIELD, Ohio (AP) -- State regulators and scientists in Ohio are working to determine whether an earthquake in northeast Ohio on Sunday has any connection to nearby injection wells.

The Warren Tribune Chronicle reported Wednesday (http://bit.ly/1qyGWpC ) that the Ohio Department of Natural Resources and scientists from Columbia University are studying the cause of the 2.1-magnitude quake centered in Weathersfield, near Youngstown.

The newspaper reports two injection wells for the disposal of wastewater from oil and gas drilling had received permission to operate nearby in March.