The Federal Bureau of Investigation on Saturday offered a $25,000 reward for information leading to the location of a missing 11-year-old New Hampshire girl last seen nearly a week ago, and the arrest of anyone responsible for her disappearance.

Authorities have been searching for Celina Cass since she went missing on July 25 from her Stewartstown, New Hampshire home, not far from the Canadian border.

The 5'5" tall Cass who has long brown hair and hazel eyes was wearing a pink shirt, pink pullover and blue shorts before she disappeared, authorities said. She was last seen at home around 9 p.m. local time on Monday.

The ongoing search for the young girl also prompted one private citizen to offer a $5,000 reward for any information leading to her whereabouts, New Hampshire senior assistant attorney general Jane Young said at a press conference.

The FBI joined local and state authorities conducting the investigation earlier in the week.

Authorities said an aggressive search for Cass continues and the reward offer does not indicate a change in the nature of the investigation. They continue to treat this as a missing person case.