Passive form of the infinitive

A) at present 
active: They say that a lot of cars are stolen every day.

• It is said that a lot of cars are stolen every day.
  → A lot of cars are said to be stolen every day.

B) in the past
active: They report that a lot of people were injured during riots in LA.

• It is reported that a lot of people were injured during the riots in LA.
  → A lot of people are reported to have been injured during the riots in LA.