An Ohio man was arrested Saturday after allegedly attempting to buy a 10-year-old girl online to "please him."

Robert W. Thomas Jr., 36, was arrested after a weeklong investigation into whether he attempted to arrange a marriage between himself and a little girl, the Akron Beacon Journal reported.

Alliance, Ohio, police and the Ohio Internet Crimes Against Children Task Force worked together in apprehending the suspect.

Thomas is accused of asking for a child between 5 to 8 years of age on an online site. Thomas wanted to keep the child permanently and "train her to please him," according to a press release obtained by WCPO.

The suspect instead offered to pay $400 for a 10-year-old girl being offered on the website, authorities said.

The offer, however, came from police.

Officers arranged a meeting with Thomas, who allegedly showed up with $400 in cash. Authorities said, after a brief conversation with Thomas, the accused went to a vehicle to get the girl. He was instead met by a team of officers who made the arrest.

Alliance detectives then executed a search warrant of Thomas' home. There, authorities said they seized a computer, electronic storage devices, sexual paraphernalia, videos and multiple firearms, including handguns, assault rifles, and a rifle with a grenade launcher mounted on it, according to WKYC.