A suspected XL bully has been destroyed after police were called to reports of "men with machetes" in a park.
Greater Manchester Police (GMP) said the "aggressive" dog had been released "in an attempt to evade police".
The force said it happened while officers were arresting two 16-year-old boys in Nutsford Vale Park, Levenshulme, at about 18:00 BST on Friday.
Videos shared on social media show the dog barking at, chasing and eventually lunging at two officers.
'Mitigate danger'
The officers can be seen running from the animal before hitting it with a baton and eventually using a Taser.
GMP said: "As officers arrived at the location, it's believed that one of the men released a large dog, believed to be an XL bully, in an attempt to evade police.
"The dog was aggressive, and several tactics were utilised in an attempt to safely restrain the dog.
"To mitigate the danger posed to the public and officers at the scene, the dog was tasered.
"Sadly, it has since passed away."
Two 16-year-old boys have since been charged with robbery and possession of an offensive weapon.
They were due to appear at Manchester Magistrates' Court.
