. >> reporter: they keep loved unupdated on their plight sends out messages that they are doing well. >>> that ship had been on a month-long voyage to study the environment. >>> russian president vladimir putin making his first public comments about the attacks. he said he will continue to fight terrorists until, quote, they are annihilated. the hospital there has been overwhelmed treating those injured in those attacks. peter sharp has that story. >> reporter: there wasn't much left of the trolly car when the ambulances arrived. but survivors were hanging on, and the hospital was less than ten minutes away. this was one of more than 20 badly injured brought here. >> translator: it felt like a huge electric shock. i didn't see anyone with a bomb. i was looking out the window, and i can't remember anything after that. >> reporter: for the second time in less than 24 hours, the wards were filled with the victims of another bombing, some with terrible burns. this doctor said his team were carrying out ten operations at the same time, but thankfully he said the trolly bomb doesn't as powe