Armed police shot dead two pit bull-type dogs after six animals went on the rampage in a town centre, attacking members of the public.
Dramatic video footage showed officers opening fire as several dogs circled them in Bolton, Lancashire, on Sunday morning.
Moments later, at least six shots were fired, with members of public posting images of the dead animals on Twitter.
Emergency services found a 60-year-old woman who had been bitten on the hand and a man with an injured leg.
A 38-year-old man was later arrested on suspicion of affray and allowing a dog to be dangerously out of control in public.
Man arrested today after dogs dangerously out of control in Bolton. https://t.co/OalxU94zWs— G M Police (@gmpolice) April 2, 2017
AGreater Manchester Police spokesman said in a statement: "At around 10.20am on Sunday 2 April 2017, police were called to reports that six dogs were dangerously out of control on Queens Park, Chorley New Road.
"Emergency services attended and discovered a 60-year-old woman suffered a bite to the hand, a man was bitten on the leg and a dog suffered serious injuries.
"Armed response officers were deployed to the scene and two dogs were humanely destroyed and two dogs have been seized. Officers are currently searching the area for another dog who is believed to be part of the group."
Police have shot dead bull dogs on deane road Bolton after attacking children and people pic.twitter.com/8w1XqTpvSy— Alan yates (@AlanAyates4303) 2 April 2017
Superintendent Chris Allsop, of Greater Manchester Police, said: “Highly trained officers responded quickly to the scene and took control to avoid the situation from escalating.
“The officers acted with our number one priority in mind: to protect people and prevent them from harm.
“I’d like to thank to the public for their patience and full cooperation as we remain at the scene and carry out our enquiries."