** Shares of Australia's Duketon Mining DKM.AX rise as much as 2.5% to A$0.082, its biggest intraday pct gain since March 31

** Stock at its highest level since April 2

** Mineral explorer signs agreement to acquire Killarney Gold project in Western Australia (WA)

** Stock has fallen 20% this year, including session's move

(Reporting by Roshan Thomas in Bengaluru)

((Roshan.Thomas@thomsonreuters.com))