Trouble breaks out towards the end of the game at Stirling
Two players were sent off following a mass brawl that marred the end of Wales Under-20's win over Scotland Under-20.
Scot Glen Bryce and Wales U20's Luke Hamilton received red cards for their part in the incident at Stirling.
Mark Bennett kicked Scotland U20 into the lead, but Ed Siggery's try and Steven Shingler's conversion gave Wales a 7-3 half-time lead.
Will Griff John, Owen Williams, Eli Walker and Ieuan Davies went over after the break in the age-group Six Nations.
Shingler added two more conversions and Joseff Griffin added a fourth.
Scotland also had Mitchell Todd and Robin Hislop sin-binned before the end-of-game dust up.
Liam Williams (Llanelli); Adam Warren (Llandovery), Ben John (Ospreys / Aberavon), Owen Williams (Blues / Cardiff), Eli Walker (Ospreys / Swansea); Steven Shingler (Scarlets / Llanelli), Jonathan Evans (Dragons); Rhodri Jones (Scarlets / Llanelli), Sam Parry (Llandovery), Will Griff John (Blues / Pontypridd), Macauley Cook (capt, Blues / Cardiff), Cory Hill (Blues / Pontypridd), Ed Siggery (Pontypridd), Luke Hamilton (Blues / Glamorgan Wanderers), Ben Thomas (Ospreys /Bridgend).
Replacements: Ieuan Davies (Cardiff), Will Taylor (Ospreys / Swansea), Matthew Screech (Blues / Pontypridd), Owen Sheppeard (Blues / Pontypridd), Lewis Jones (Pontypridd), Joseff Griffin (Blues / Cardiff), Jack Gadd (Bristol).