Mexico City - A delicate effort to reach a girl buried in the rubble of her school stretched into a daylong vigil for Mexico, much of it broadcast across the nation as rescue workers still struggled in rain and darkness early on Thursday trying to pick away unstable debris and reach her.The sight of her wiggling fingers early Wednesday became a symbol for the hope driving thousands of professionals and volunteers to work frantically at dozens of wrecked buildings looking for survivors of the magnitude 7.1 quake that killed at least 245 people in central Mexico.Volunteer rescue worker Dr. Pedro Serrano managed to crawl into the crevices of the tottering pile of rubble that had been Escuela Enrique Rebsamen.He made it into a classroom, but found all of its occupants dead."We saw some chairs and wooden tables. The next thing we saw was a leg, and then we started to move rubble and we found a girl and two adults - a woman and a man," he said."We can hear small noises, but we don't know if they're coming from above or below, from the walls above (crumbling), or someone below calling for help."The death rose after Mexico City Mayor Miguel Angel Mancera said the number of confirmed dead in the capital had risen from 100 to 115.An earlier federal government statement had put the overall toll at 230.