<a href="https://en.wikipedia.org/wiki/Indonesian_Navy" id="mwAV0" rel="mw:WikiLink" title="Indonesian Navy">Indonesian Navy</a> submarine <a href="https://en.wikipedia.org/wiki/KRI_Nanggala_(402)" id="mwAV4" rel="mw:WikiLink" title="KRI Nanggala (402)">KRI Nanggala (402)</a> sinks in the <a href="https://en.wikipedia.org/wiki/Bali_Sea" id="mwAV8" rel="mw:WikiLink" title="Bali Sea">Bali Sea</a> during a military drill, killing all 53 on board.<sup about="#mwt61" class="mw-ref reference" data-mw='{"name":"ref","attrs":{"name":"reuters.search"},"body":{"id":"mw-reference-text-cite_note-reuters.search-13"}}' id="cite_ref-reuters.search_13-0" rel="dc:references" typeof="mw:Extension/ref"><a href="./April_21#cite_note-reuters.search-13" id="mwAWA" style="counter-reset: mw-Ref 13;"><span class="mw-reflink-text" id="mwAWE">[13]</span></a></sup>