Updated

The Latest on the manhunt of Georgia inmates accused in the slaying of prison guards. (all times local):

7:30 p.m.

A Georgia sheriff says the reward is now $115,000 for information leading to arrests of two inmates who killed two guards and escaped from a prison bus.

Putnam County Sheriff Howard Sills says in a brief email to The Associated Press that "many significant contributions" boosted the reward from $70,000.

Authorities say 43-year-old Donnie Russell Rowe and 24-year-old Ricky Dubose have stolen at least two vehicles for their getaway.

The first was a Honda that was found hidden in woods near a house they ransacked about 25 miles (40 kilometers) from the site of the killing. Police say they then stole a white pickup truck from an industrial site in the area.

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5:30 p.m.

A Georgia sheriff says a green Honda stolen by two inmates who killed their guards before escaping from a prison bus has been located.

Putnam County Sheriff Howard Sills said the "grass green" Honda Civic was found Wednesday in a wooded area in Madison not far from a house that the pair had burglarized Tuesday. Sills said the car was intentionally concealed.

Authorities say the two men overpowered and killed 42-year-old Sgt. Christopher Monica and 58-year-old Sgt. Curtis Billue on a prison transport bus on state Highway 16 in Putnam County before fleeing in the stolen Honda.

Authorities say the two men then traveled about 25 miles north to Madison, where they broke into a house Tuesday morning and then stole a white Ford F250 pickup truck with the Georgia tag BCX5372 from a nearby industrial site.

Authorities don't know whether the two men are still in Georgia or whether they're traveling together.

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1:55 p.m.

A Georgia corrections official said two escaped inmates accused of killing two prison guards have known each other for "quite a while" and it's possible they planned the escape together.

Department of Corrections Assistant Commissioner Ricky Myrick said 43-year-old Donnie Russell Rowe and 24-year-old Ricky Dubose have been cellmates more than once, but he wasn't sure whether they were cellmates at Baldwin State Prison just prior to their escape.

Authorities say the two men overpowered and killed 42-year-old Sgt. Christopher Monica and 58-year-old Sgt. Curtis Billue on a prison transport bus before fleeing in a stolen car.

Putnam County Sheriff Howard Sills said the pair ransacked a house in Madison, about 25 miles north of where the killings happened, and then stole a white pickup truck from a nearby business.

Sills said both men were violent repeat offenders and are considered armed and dangerous.

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1:35 p.m.

A Georgia sheriff says two escaped inmates accused of killing two prison guards are believed to have stolen a white pickup truck.

Authorities have said 43-year-old Donnie Russell Rowe and 24-year-old Ricky Dubose overpowered and killed 42-year-old Sgt. Christopher Monica and 58-year-old Sgt. Curtis Billue and escaped from a prison transfer bus around 6:45 a.m. Tuesday.

Immediately after the escape, authorities said, the two carjacked a driver and fled in his green Honda Civic and went to Madison, about 25 miles to the north, where they burglarized a house.

Putnam County Sheriff Howard Sills said Wednesday that the two are believed to have stolen a 2008 white Ford F250 pickup truck with the Georgia tag BCX5372 from a business about 9 miles from the burglarized house in Madison. The truck was stolen between 6 p.m. Tuesday and 6 a.m. Wednesday.

Sills says the green Honda still hasn't been recovered and it's unknown whether the two men are still traveling together.

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11:15 a.m.

A Georgia sheriff says authorities still don't know the whereabouts of two escaped Georgia inmates accused of killing two prison guards.

Authorities have said 43-year-old Donnie Russell Rowe and 24-year-old Ricky Dubose overpowered and killed 42-year-old Sgt. Christopher Monica and 58-year-old Sgt. Curtis Billue and escaped from a prison transfer bus around 6:45 a.m. Tuesday.

Putnam County Sheriff Howard Sills said Wednesday that the two inmates "thoroughly ransacked" a house in Madison, about 25 miles north of where the escape happened, several hours after the guards were killed. Sills says they took some food and likely some clothes and left their prison uniforms behind.

Sills says authorities aren't sure where they went after that, but he suspects they're no longer in the Madison area.

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7:45 a.m.

The reward has increased for information leading to the arrests of two escaped Georgia inmates accused of killing two prison guards.

Georgia Bureau of Investigation spokeswoman Nelly Miles said in an email Wednesday that multiple agencies have contributed $70,000 to the arrest of 43-year-old Donnie Russell Rowe and 24-year-old Ricky Dubose.

Authorities say Rowe and Dubose killed Baldwin State Prison transfer sergeants 42-year-old Christopher Monica and 58-year-old Curtis Billue after overpowering and disarming them on a transport bus Tuesday morning.

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3:29 a.m.

Authorities say two Georgia inmates serving long prison sentences and "dangerous beyond description" overpowered and killed two guards on a prison bus before fleeing in a stolen car.

Putnam County Sheriff Howard Sills says the deadly escape happened about 6:45 a.m. Tuesday as the guards drove 33 inmates between prisons, and it set off a massive manhunt involving local, state and federal officers.

Sills was emotional as he described the scene.

Stills says Donnie Russell Rowe, serving life without parole, and Ricky Dubose, who has prominent tattoos on his face and neck, overpowered, disarmed and killed Sgt. Christopher Monica and Sgt. Curtis Billue and then carjacked a driver who happened to pull up behind the bus on a rural highway.

They got into the "grass green," four-door 2004 Honda Civic with the Georgia license plate number RBJ-6601 and drove west on state Highway 16 toward Eatonton, southeast of Atlanta.