A masked gunman shot dead 14 people and wounded 30 to 40 others at a showing of new Batman movie "The Dark Knight Rises" at a movie theatre in the US city of Denver, local radio station KOA reported on Friday, citing witnesses.
The local radio station said a figure in a gas mask had opened fire at the showing in a mall in the suburb of Aurora and set off a smoke or tear gas bomb. It said initial police estimates were of 30-40 injured.
Police dispatchers say calls about the shooting started coming in about 12:30 am Friday from a mall theater that was showing the Batman movie "The Dark Knight Rises."
Police say one person has been arrested, but no other details were available.
Police spokeswoman Cassidee Carlson says "the scene is still very active and we have little information for release at this time."
Swedish Medical Center spokeswoman Nicole Williams says two of the injured have arrived at her hospital in critical condition, and the hospital has been told there could be several more.