Montgomery County sheriff’s deputies are investigating a robbery by two men that took place Friday night at a convenience store in Splendora.

According to initial reports, two men entered a Stop N Go located at the 27100 block of East River Road. One of the suspects flashed a knife at the store clerk and asked that the clerk hand over the key to the ATM, authorities said.

The clerk was struck over the head after he told the two men that he did not have the key, officials said.