AUSTIN, Texas (AP) — The panel that regulates the Texas oil and gas industry is waiting for more information before will accept that there are any links between increased seismic activity and drilling activity — especially hydraulic fracturing, or fracking, its executive director told lawmakers on Monday.

The Texas Railroad Commission was reviewing how it regulates wells used for storing wastewater from drilling, Milton Rister, the commission’s executive director, told the Texas House Subcommittee on Seismic Activity.