Police have cordoned off an area of Sheffield while officers search for a gunman.
A man was seen with a gun entering a disused brewery in Neepsend Lane, Neepsend, at 5.15am today.
Officers are now searching the area looking for him.
Armed police are involved in the operation.
A South Yorkshire Police spokeswoman said: "There is currently a high police presence in the Neepsend Lane area of the city and there is significant disruption for traffic and pedestrians due to a number of closed roads.
"Reports were received at around 5.15am this morning that a man had been seen with what is believed to be firearm, entering a disused brewery at the back of Neepsend Lane.
"Officers were immediately deployed and secured the scene.
"The area being searched for the man within the brewery and disused land is vast, and to ensure the public’s safety while this carried out a number of roads have been cordoned off and will remain closed throughout the morning
"The junctions at Penistone Road and Rutland Road onto Neepsend Lane are both closed as well as Burton Road and Douglas Road.
"Please avoid this area this morning if possible as traffic will be significantly heavier than usual and delays are very likely."
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