rtokens: Fire department officials said they were investigating the cause of the blast and searching for any more casualties .
pos: NNS VBD NNP NN NNS PRP VBD DT NN NN VBD IN DT NNP NNP NNP CC VBD NN RB IN DT NN .
tokens: Eyewitnesses told Boston television stations they saw a gasoline truck parked behind the Lilac Falls Motel and smelled gasoline shortly before the explosion .
ltokens: As far as I know , it 's been to four alarms -- more trucks , more people , " said Don Penney of the Rochester Fire Department said .