By Denise Warner
Updated April 15, 2013 at 08:54 PM EDT

After two explosions occurred at the finish line of today’s Boston Marathon, celebrities have been tweeting their thoughts and prayers for the victims. New Kids on the Block singer Joey McIntyre was among the runners in the race, and wrote on his account that he was safe. Other Boston-based stars, including Donnie Walhberg, Chris Evans, Tom Bergeron and Maria Menounos also offered their support on the social network. Click below to see their tweets and more.