SWAT officers were called to the Trump International Hotel and Tower Wednesday morning after an armed woman walked into the downtown skyscraper during an apparent domestic-related incident, sources said.

About 11:35 a.m., the woman was brandishing a rifle when she entered the building at 401 N. Wabash Ave., according to two law enforcement sources. The incident was thought to be domestic in nature and wasn’t immediately linked to terrorism.

Chicago police spokespeople wouldn’t immediately provide any information.

This is a developing story, check back for details.