Three boys were arrested this week after allegedly setting fire to a shopping cart and trash cans in Mililani. 

Police said a 16-year-old boy set fire to three plastic trash cans on the Mililani High School campus about 7:30 p.m. Oct. 11.

The same boy and two 14-year-olds set a Times Super Market cart on fire about 8:20 p.m. the same night in Mililani. 

Police arrested the younger boys Wednesday and the older boy Thursday on suspicion on fourth-degree arson.  

They were all released to their parents.