A police officer has been injured and residents are being ordered to get indoors because of an ongoing armed stand-off in a Lincolnshire village.
Chapelgate residents in the village of Sutton St James, near Holbeach, are being told to go to a friend or relative's house, or nearby Sutton St. James Primary School, if they are unable to get to their homes.
They are also being told not to gather in public places.
A gunshot was reportedly fired at a police car.
Armed police are currently outside a property in the area with the gunman thought to be inside.
Negotiations are taking place, according to local newspaper Spalding Today.
Lincolnshire Police confirmed they are dealing with a firearms incident and that an officer has sustained minor injuries, but would not say any more.
The area affected is between Bells Drove and Taylor's Drove.
"The incident is still ongoing and therefore we are unable to release further information. Updates about the incident or its implications on the public will be provided when possible," said a statement from the force.
"There was a helicopter here earlier but now the road is full of vehicles, police incident vehicles and ambulances and people are putting on bullet [proof] jackets and things," Margaret Cawood, who lives on Chapelgate, told the BBC.
"They look as though they are concentrating on one house about 200 feet away."
One nearby resident tweeted: "3:30pm we watched 8 police cars go flying past house, inc 1 armoured & 1 riot. now all clear, hope no one seriously injured."