Authorities have increased the reward to $50,000 each for the two remaining fugitives from the recent New Orleans jailbreak, as law enforcement officials say they’re tightening the net around the escapees.

At a Thursday press conference, both Crimestoppers of Greater New Orleans and the FBI New Orleans announced they are each contributing $20,000 per fugitive. The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) added another $10,000 per person to the bounty.

Since the May 16 escape from the Orleans Justice Center, authorities have recaptured eight out of the ten inmates who got out. The two still at large are Antoine Massey and Derrick Groves.

“Today marks day 13 in our search for escapees Antoine Massey and Derrick Groves, and we want you to know that we will find them,” said Jonathan Tapp, special agent in charge at FBI New Orleans.

Colonel Robert P. Hodges, head of the Louisiana State Police, echoed that confidence, telling reporters the pair are still within the city limits and getting help, but “the walls are closing in.”

Public tips have played a major role in the investigation so far, directly leading to the arrest of three escapees. Authorities confirmed one reward has already been paid, with the other two set to follow soon.

More than a dozen individuals have been arrested and charged for allegedly assisting some of the fugitives. Among them, five were accused of helping 26-year-old Lenton Vanburen, who was apprehended Monday in Baton Rouge thanks to a tip from a concerned citizen. According to a statement from local police, Vanburen was found sitting on a bench near a department store when officers moved in.

Meanwhile, a jail maintenance worker, Sterling Williams, has been charged after allegedly shutting off the water in a cell to enable the escape. Investigators say this allowed inmates to remove the toilet and access the wall behind it. Williams reportedly told officials that Massey threatened to stab him unless he cooperated.

However, Williams’ attorney, Michael Kennedy, has pushed back, claiming his client wasn’t aiding the inmates but simply responding to a plumbing issue in a rarely used handicapped cell.

A photo released by the Orleans Parish Justice Center shows the crude escape route—a hole behind a detached toilet—with graffiti nearby reading “To Easy Lol” and “We Innocent.”