Earlier posts as it happened:

Reports that Ukrainian forces have fired mortars & grenades on LPR locations

USD jumping higher on the reports of Ukraine forces firing grenades, mortars

Risk off on the shooting reports out of Ukraine

Story so far:

The reports are of mortars and grenades being fired by Ukrainian forces in the LPR region. LPR is Luhansk People's Republic, located in Luhansk Oblast in the Donbas region, a territory internationally recognized to be a part of Ukraine but run by Russian backed separatists.
Shooting in LPR regions is not unusual, but in this current environment sensitivity is MUCH higher.
The reports come out of Russian state media ... so maybe they are accurate or maybe they are not. If they are not its probably even more ominous as it may be the cover needed for military action by Russian forces.

Regardless of who is doing what, 'risk' markets have taken a hit and safe havens have benefited. AUD/JPY a big mover:

audyen chart 17 February 2022