A couple has allegedly been stabbed and another man was allegedly assaulted on their morning walks through Adelaide. An armed man could allegedly be seen approaching the dog walkers waving a weapon before he slashed the pair. The man allegedly stabbed a man and woman, both 63, walking their dog on Thompson Ave at Salisbury Downs. A Salisbury Downs man, 29, was later tasered and arrested by police at a nearby petrol station on Salisbury Highway. "Police received multiple reports from members of the public of a man armed with a sharp weapon," a spokesman said.