Panicked neighborhoods evacuate as gas blasts destroy homes

LAWRENCE, Mass. (AP) — A series of gas explosions left at least four people injured and ignited fires in at least 39 homes in three communities north of Boston on Thursday, forcing entire neighborhoods to evacuate as crews scrambled to fight fires and turn off gas and electric lines to prevent further damage.Massachusetts State Police urged all residents with homes serviced by Columbia Gas in Lawrence, Andover and North Andover to evacuate Thursday afternoon, snarling traffic and causing w