The <a href="https://en.wikipedia.org/wiki/Iva_Valley" id="mw-w" rel="mw:WikiLink" title="Iva Valley">Iva Valley</a> Shooting occurs after the coal miners of <a href="https://en.wikipedia.org/wiki/Enugu" id="mw_A" rel="mw:WikiLink" title="Enugu">Enugu</a> in <a href="https://en.wikipedia.org/wiki/Nigeria" id="mw_Q" rel="mw:WikiLink" title="Nigeria">Nigeria</a> go on <a href="https://en.wikipedia.org/wiki/Strike_action" id="mw_g" rel="mw:WikiLink" title="Strike action">strike</a> over withheld wages; 21 miners are shot dead and 51 are wounded by police under the supervision of the <a href="https://en.wikipedia.org/wiki/Colonial_Nigeria" id="mw_w" rel="mw:WikiLink" title="Colonial Nigeria">British colonial administration of Nigeria</a>.