Maryland : At least a dozen homes are damaged , an official estimate . Buildings collapse , trapping a number of people . Radar reports a funnel cloud at 6:41 p.m. Two people are hurt in the town of Bel Air , Maryland .
NEW : At least a dozen homes are damaged , an official says . Buildings collapse , trapping a number of people . Radar detected a funnel cloud at 6:41 p.m. 4 people are hurt in the town of Bel Air , Maryland .