A Mexican citizen who allegedly overstayed a work visa was arrested early Saturday morning in Hallowell for the alleged sexual assault of a 25-year-old woman, police said.

Zuniga Balderas, 33, who also goes by the name Javier, was charged with one Class A count of gross sexual assault and one Class C count of unlawful sexual contact, Hallowell police Chief Christopher Giles said.

Police arrested Balderas around 1 a.m., Giles said. The alleged assault happened downtown on Front Street, outside the former Wharf nightclub.

According to federal immigration authorities, Balderas was in the United States illegally after overstaying a work visa, Giles said.

Balderas was staying in Augusta and working as a roofer, and he has a temporary driver’s license from Georgia, Giles said.

Balderas was being held without bail on the criminal charges. Federal authorities were also holding Balderas on a “no release status” for the immigration violation, according to Giles.

Requests sent Monday to U.S. Immigration and Customs Enforcement and U.S. Customs and Border Protection for more information about the immigration violation and whether the federal government expects removal proceedings were not immediately responded to.

HOW TO GET HELP

IF YOU or someone you know has experienced sexual violence, call 1-800-871-7741 for free and confidential help 24 hours a day.

TO LEARN more about sexual violence prevention and response in Maine, visit the Maine Coalition Against Sexual Assault website.

IF YOU or someone you know is struggling with a mental health crisis, you can also call the Maine Crisis Line 24 hours a day at 1-888-568-1112.

FOR MORE information about mental health services in Maine, visit the website for the state’s chapter of the National Alliance on Mental Illness.

This is a developing story.