A man has died two days after being stabbed in West Dallas last week, according to a statement Monday by police. Officers responded to a call about a stabbing in the 3300 block of Brantley Street on Friday at about 1:20 a.m., a statement from Dallas police said. When officers arrived at the scene, they found a man that had been stabbed.

A Walmart employee was helping a customer check out when she heard a warning that someone in the store had a knife.

Darius Barney, 25, was arrested less than two hours after the deadly attack on Saturday night, Chicago police said.

One of the men who authorities say helped take down a suspect who stabbed eleven people at a Walmart told NBC News about how he sprung into action. Marine veteran Matthew Kolakowski says he took off running after the suspect and rammed him with a grocery cart to prevent him from hurting more people.

A man has been arrested on suspicion of murder following a quadruple stabbing at a business in south-east London. Two men aged 58 and 27 were killed and another two taken to hospital following the stabbing on Long Lane in Bermondsey at about 13:00 BST on Monday.

In an ABC News exclusive, Derrick Perry recounts his confrontation and pulling his gun on the man accused of stabbing 11 people at a Michigan Walmart.