Shots fired at Ind. real estate office Last Updated 2:16 p.m. (CBS News) VALPARAISO, Ind. - Police have swarmed a real estate office building, where a man with a gun is inside and is believed to be holding hostages. The incident began Friday morning at a Prudential Real Estate office on Calumet Avenue. Police received a 911 call about a man with a gun inside the building at 10:30 a.m., Valparaiso Police Sgt. Mike Grennes told CBS Station WBBM. Sources have confirmed that shots were fired, but it was unclear if the gunfire happened inside or outside of the building. Officials later said there have been no injuries. CBS Affiliate WSBT reports that authorities have ID'd the suspect but have not released information, except to say he is not an employee at the company. As of just before noon Friday, the man was still in the building. Hostage negotiators are in contact with him. WBBM correspondent Kris Habermehl reports heavily-armed officers from Valapariso Police and the Porter County Sheriff's Department surrounded the triangular insurance office building. Streets were blocked surrounding the area, and schools in the area are now on lockdown.