A man from South Shields has pleaded guilty to using Facebook to threaten to kill 200 school children.
Reece Elliott made threats against children in Tennessee, causing thousands of pupils in the area to miss school.
Father-of-one Reece Elliott, 24, of Fossway, South Shields, South Tyneside, went on a tribute site for a 17-year-old Tennessee girl who was killed in a car accident and left a series of messages under a false name.
The incident followed the Newtown shooting which saw 20 children and six adults shot in an elementary school.
Newcastle Crown Court heard that because of Elliott's posts, 3,000 pupils in the Warren County area missed school the next day.
Security was also stepped up at schools in the surrounding area and armed guards had a visible presence.
The prosecution said Elliott confessed to being a part-time troll who posted offensive comments to see what kind of a reaction he could provoke.
Elliott admitted one count of making a threat to kill and eight of sending grossly offensive messages. He pleaded not guilty to four other counts of making threats to kill, which the prosecution accepted. Sentencing is due to take place in June.