NEW : as many as 700 students killed , At least 50 injured ; toll is expected to rise . He said dozens of students appeared to be trapped inside but could n't give an exact number . General Hospital official says as many as 700 of students appear to be trapped in Haiti school . Rescue workers digging through rubble near Port-au-Prince , official says . School could have At least 50 people in it , rescue official says .
NEW : as many as 700 students killed , At least 50 injured ; toll is expected to rise . General Hospital official says as many as 700 of students appear to be trapped in Haiti school . Rescue workers digging through rubble near Port-au-Prince , official says . School could have At least 50 people in it , rescue official says .