BOSTON (CBS) – Canada’s Josh Cassidy made it a one-man race Monday, winning the men’s wheelchair division of the 2012 Boston Marathon in a new world record of 1 hour 18 minutes and 24 seconds.

The previous record of 1:18:27 was set by Ernst Van Dyk in Boston back in 2004.

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Kurt Fearnley of Australia finished second Monday in 1:21:39.

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The women’s race was neck-and-neck to the end, but Shirley Reilly of Tuscon, Arizona won it in 1:37:36, edging out 5-time Boston Marathon winner Wakako Tsuchida of Japan by one second.

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Reilly was second to Tsuchida in last year’s race.