The six astronauts aboard the International Space Station are among the many people sending condolences to the people of Boston after two bombs went off at the finish line of the city's famous marathon today (April 15).
"Our crew just heard about the horrible events at the Boston Marathon. We all pass our condolences and thoughts to everyone affected," Expedition 35 commander Chris Hadfield said today via Twitter, where he posts as @Cmdr_Hadfield.
The cause of the explosions remains under investigation as of Monday evening. Boston police officials have confirmed that the blasts killed at least three people and wounded more than 100.
Follow Mike Wall on Twitter @michaeldwall. Follow us @Spacedotcom, Facebook or Google+. Originally published on SPACE.com.
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Michael Wall is a Senior Space Writer with Space.com and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.