An Augusta man is facing charges after allegedly threatening a clerk and customers in an Eastern Avenue convenience store.

Robert M. Warnock, 52, is charged with terrorizing, operating under the influence and two counts of having a loaded firearm in a vehicle. Warnock was held Tuesday at the Kennebec County jail in lieu of $2,000 cash bail.

Police were called to Eastern Avenue shortly after 10 p.m. Monday when a “highly intoxicated” man was reported walking around the Irving Circle K convenience store with a rifle. Augusta police Officer Jesse Brann, who had noticed Warnock appeared intoxicated when speaking to him an hour before, wrote in an affidavit that Warnock’s eyes were bloodshot and that he smelled strongly of alcohol.

“Robert admitted that he just drove to the store to get cigarettes and a lighter,” Brann wrote. Warnock said he had had his most recent drink an hour earlier.

Brann and Augusta police Sgt. Eric Lloyd then spoke to the Circle K clerk, who said Warnock had been in the store and had complained about the pizza.

“She said while he stood at the counter, he took out some bullets and began making comments about killing people tonight and wanted to know if she wanted to be one of them,” Brann wrote. The clerk said Warnock then turned around to other customers in the store and “asked them if they wanted their heads blown off, too.”

The clerk told police she tried hitting a panic alarm to summon police.

Later in the evening, Warnock told Brann that he was upset with his neighbors because he thinks they sell drugs, Brann wrote.

“His plan tonight was to go to their residence and hold them hostage at gunpoint to get their drugs and then call us,” Brann wrote. “Robert was very fixated on their drug activity and got agitated when he spoke about it.”

Brann, as he spoke to Warnock, noticed two rifles in the back seat of Warnock’s car. Brann later learned they were a 12-gauge shotgun and a 30-30 lever action rifle. Both were loaded with one round in the chamber, Brann wrote.

Brann wrote that he asked Warnock to perform a series of sobriety tests, all of which he failed.

“During my entire interaction with him he spoke very slowly and in a slurred speech,” Brann wrote. “He was very unsteady on his feet.”

Warnock was arrested and taken to the police station, where he took a breath test to measure his blood-alcohol level. Warnock registered a 0.21, which is nearly three times the legal limit for driving.