WATERVILLE — Police on Tuesday arrested a third man in connection with the Aug. 21 robbery of the Rite Aid pharmacy on Main Street.

Nicholas Hunter, 33, of 148 College Ave., No. 46, made a call to police before the robbery was reported at 7:53 a.m. in an effort to divert police officers from the robbery, said Waterville Police Chief Joseph Massey.

The caller told police that a man with a high-powered rifle was in a location other than Rite Aid at 210 Main St., he said.

“Detective Alan Perkins has been working to identify that person who made the call, obviously, since the robbery occurred, and was able to gather enough information to identify Hunter,” Massey said.

Hunter was arrested Tuesday on College Avenue. He was not at the pharmacy the morning of the robbery, but was charged with Class B robbery, a felony, for his part in it, according to Massey.

Hunter is the father of Carl Hunter, 19, of Spring Place, who was arrested the day of the robbery along with Lance Vashon, 34, of 23 Highland Ave. Both were charged with Class B robbery.

The two robbers did not display a weapon when they approached the pharmacy, but they handed the clerk a threatening note demanding OxyContin, which the clerk gave them, Massey said at the time. Police found a backpack containing the drugs in a trash receptacle. It was the 37th pharmacy robbery in Maine this year.

A jail spokeswoman said Wednesday that the Hunters and Vashon were still at the jail.

Carl Hunter’s bail was $50,000 cash, but there was a probation hold placed on him; so even if he met the bail, he would not be able to leave.

Vashon’s bail was $25,000 cash or $100,000 surety. Nicholas Hunter’s initial bail was $100,000 cash, but it was reduced Wednesday in court to $10,000 cash with a pre-trial contract or $50,000 surety, the jail spokeswoman said.

Paperwork from Kennebec County Superior Court, dated Wednesday, showed a charge of conspiracy to commit robbery added to Nicholas Hunter’s charges.

Massey said the Kennebec County District Attorney’s Office may have added that charge Wednesday, as the Police Department had charged him only with Class B robbery.

A call to Acting District Attorney Alan Kelley was not returned immediately.