A Buffalo man accused of trying to entice a minor into sexual activity pleaded guilty Monday before Chief U.S. District Judge William M. Skretny to a single charge of attempting to receive child pornography.

Robert P. Dombrowski, 51, was arrested in March 2012 after arriving at a Cheektowaga restaurant to meet someone he had been chatting with online since February.

Prosecutors said Dombrowski believed the online person was a minor, but it actually was an undercover FBI agent.

Assistant U.S. Attorney Edward H. White said Dombrowski faces a mandatory minimum sentence of five years in prison.