What were the most common targets in the 55 fire raising attacks? [originaltext]

Police in the United States are questioning a man over 55 fire raising attacks in Los Angeles since Thursday, in which cars have been set alight apparently at random, mostly in the middle of the night. The series of fire raising attacks have left a trail of damaging garages and carports.(5)Most of the fires were set in parked vehicles. In several cases, the flames jumped to nearby buildings, including apartment units in Hollywood, but no one has been hurt. The fire raising attacks are believed to be the worst outbreak of deliberately set fires since the Los Angeles riots in 1992. Dozens of detectives have been assigned to the case, (6)and a reward of $35, 000 has been offered for information leading to a conviction.