How similar are these two sentences, on a scale from 0-5 (0 is "not similar" and 5 is "very similar")?

Toulouse siege: Police surround flat of 'Islamic warrior' suspected of being serial killer
Toulouse shooting: France was on the highest level of security of security alert

OPTIONS:
- 0
- 1
- 2
- 3
- 4
- 5
2