1. It is this knife that police have released images of today.

2. The machine presented a number of possible ways to move the knife that users can choose from.

3. He said he stabbed her eight times and left the knife in her mouth.

4. Officials said the boy planned to carry out a knife attack in a public place last weekend.

5. He had been stabbed several times in an attack so brutal that police said the knife broke.

6. Whoever comes at us with a knife needs to know that they will be shot.

7. She described how she got the knife and stabbed the old woman more times than she could remember.

8. Officials say a man with a knife attacked a police officer at Parliament and was shot by officers.

9. One woman was shot and the other was stabbed with a knife, police said.

10. He holds a knife and is dressed in black with his face obscured.

11. I thought it was an accident initially until I saw the guy come out with a knife, he said.

12. Prime Minister Tony Abbott said the knife attack was inspired by the Islamic State group.

13. One of the attackers shoots a man on the ground and waves a knife before running out.

14. The killer then takes the knife to the neck of the hostage, who is seen closing his eyes.

15. She says when the policemen asked him to halt, he pulled out a knife and charged toward them.