Police said Downing walked into a federal building at 201 Varick St. just after 5 p.m. with guns hidden in a bag.
Investigators were trying to learn more about Adam Lanza and questioned his older brother, who was not believed to have been involved in the rampage at Sandy Hook Elementary. Police shed no light on the motive for the second-deadliest school shooting in U.S. history.
The man who shot and killed a former co-worker outside of the Empire State Building was not evicted but was told to vacate his Upper East Side apartment so the landlord could make renovations, a police source told Reuters.
Authorities did not disclose specific details about the injuries suffered by the men.