A gunpowder factory <a href="https://en.wikipedia.org/wiki/1634_Valletta_explosion" id="mwQQ" rel="mw:WikiLink" title="1634 Valletta explosion">explodes</a> in <a href="https://en.wikipedia.org/wiki/Valletta" id="mwQg" rel="mw:WikiLink" title="Valletta">Valletta</a>, Malta, killing 22 people and damaging several buildings.