BEXAR COUNTY, Texas (KTRK) — The Bexar County Sheriff’s Office is investigating the alleged assault of a poll worker at an early voting location.

Bexar County Elections Administrator Jacque Callanen said the incident happened Thursday night as the polls were about to close.

The election clerk who was assaulted received medical treatment at the scene and later went home, officials said.

The electoral administrator did not say what led to the aggression.

“I said just be nice,” Callanen said. “We’re asking for this more and more because as the lines get longer, it’s obvious that people get a little bit more tense because they’re queuing. We get it, but the officials are doing a fantastic job and they don’t have to be treated like that .

It is unclear if anyone will be charged in this incident.

The early voting site was back open Friday, but a law enforcement officer is posted at the polling place.