The section of the Dangerous Dogs Act under which two women have been arrested relates to allowing a dog to enter a private property where it is not permitted and the animal then injuring a person.
In March, a 14-year-old girl died after she was attacked by a pack of dogs at a house in Greater Manchester.
Jade Anderson was savaged by up to five dogs at a house she was visiting in Chaucer Grove, Atherton near Wigan. The animals were shot by police.
More top news
Karl, 17, was stabbed to death when his friends became involved in a row with around a gang of youths in Hackney, east London in 2004.
Researchers believe they have found the wreckage of British explorer James Cook's ship "Endeavour".
Four kittens have been rescued from a fire by emergency services in California, USA.