Lower Merion police said the speed of one car was a factor.
No one was hurt and nothing was stolen in the March 28 incident on City Avenue, police said.
The cause of the 21-year-old student's death is not yet known.
Lower Merion police reported last week's crimes Monday.
Matthew Ainsworth was 21.
Township police arrested several people in the Bala Cynwyd area in the past week.
The blaze charred parts of the three-story building in the Wynnefield section of the city, near Bala Cynwyd.
The Bala Cynwyd convenience store was targeted Saturday morning.
The unidentified man fell about 20 feet during a construction job.
Ira Pressman is being held in lieu of $1 million bail.
The department says the policy is necessary to keep its six companies on the vanguard of safety and to aid in the recruitment and retention of volunteers
A 23-year-old Philadelphia man was arrested.
The alleged thieves were collared in Penn Valley early Friday morning.
Unlocked cars in Penn Valley, Bala Cynwyd and Merion were targeted.
A Penn Valley resident was charged with driving under the influence.