FAIRVIEW, Okla. (AP) - Three earthquakes have struck near the northwest Oklahoma towns of Fairview and Helena.

The U.S. Geological Survey says a 3.1-magnitude temblor hit near Helena Friday at around 2:45 p.m. Earlier in the day, two quakes with 3.4 and 3.3 magnitudes hit near Fairview.  No injuries or damage were immediately reported.

Oklahoma's earthquakes have been linked to the injection of wastewater underground from oil and gas production and state regulators have recommended reducing the volume or shutting down some of the disposal wells.

 This week, Gov. Mary Fallin approved the use of nearly $1.4 million in state emergency funds for state agencies working to reduce the increasing number of quakes linked to the disposal of oil and gas wastewater in Oklahoma.